* fix(ci): stop five stale or flaky CI reds and retry CyberArk policy-load conflicts
The Langfuse redaction unit test exports to a local OTLP capture instead of
polling Langfuse Cloud through a recorded lookup. The passthrough worker-kill
test only requires spend rows for requests the surviving worker served. The
spend-routes sweep treats the intentional /spend/capture_rate 503 as expected.
CyberArk retries a 409 policy load in Python, Rust and the e2e Conjur helper
instead of reading it as "variable exists". The integration egress guard now
matches the script's own cgroup, so it no longer blocks the CircleCI agent,
which runs as the same user.
* fix(ci): keep the policy-load backoff typed as float
* fix(ci): retry CyberArk policy loads without blocking the event loop and tighten the worker-kill and Langfuse tests
* fix(secrets): load CyberArk policy one request at a time per manager
* test(secrets): pin that non-conflict CyberArk policy failures are not retried
* test(unit): run tests/unit with only an allowlisted host environment
CircleCI's unit job inherits every project env var, so real provider keys,
REDIS_HOST, DATABASE_URL and AWS or Azure credentials reached tests that
assume none are set. Locally, litellm's import-time load_dotenv did the same
from any .env up the tree. The unit conftest now drops every variable outside
a small allowlist and disables dotenv before litellm is imported.
* test(e2e): name a failed search and the stuck batch status instead of misattributing them
The websearch session test read an empty web_search_tool_result_error block as a
successful search, so a failing search tool surfaced as a session billing bug.
The batch cancellation timeout now reports the last status the proxy returned.
* fix(ci): scrub the host environment per unit test instead of for the whole pytest process
GHA shards run tests/unit next to other suites in one process, so the import-time
scrub deleted MCP_TEST_PEER_PYTHON before tests/mcp_tests read it and the MCP
upstream fell back to the SDK2 interpreter. The two websearch tests that called
OpenAI and Perplexity live are removed: tests/unit no longer sees their keys.
* fix(ci): scrub only the host variables present before litellm is imported
The per-test scrub also deleted TIKTOKEN_CACHE_DIR, which litellm sets at import to
its bundled encodings, so tokenizer paths tried to download them and hit the
socket guard. The prisma setup test now passes its own database URL instead of
reading one another test leaked into the process environment.
* fix(ci): stop the order-dependent unit reds and settle logging tasks on their own queue
LoggingWorker marked a task done on whichever queue was current when the callback
finished, so a callback that outlived an event-loop change raised "task_done()
called too many times" or undercounted the new loop's queue. It now settles the
queue the task came from.
The rest are test isolation fixes for failures that only appeared when another
file ran first on the same xdist worker: a replaced user_api_key_cache, breaker
metrics unregistered by prometheus tests, semantic_router's health-check filter on
uvicorn.access, logging tasks carried over from bedrock tests, a Router-written
model_cost entry, and a stray post captured by the langflow test. The token
counter check now asserts bounded chunking instead of wall-clock time.
* test(e2e/ui): wait for the logout redirect before visiting a protected page
Logout revokes the session server-side before clearing cookies and navigating, so an immediate page.goto either ran with the cookie still set or was aborted by the logout redirect (net::ERR_ABORTED).
* test(unit): restore the prometheus metrics config per test and settle logs carried from earlier tests in the a2a cost tests
* test(router): pin the router clock in the usage counter tests so a minute rollover cannot empty the read
* test(e2e/ui): wait for logout to clear the token cookie instead of for a login redirect
* test(integration/mcp): answer the model-info probe another test's proxy sends to the model double
* refactor: clean up fresh tech debt from 2026-09-24 (stacked comprehensions, getattr, bare dict)
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* chore: drop the budget ratchet from the PR branch, the default-branch automation owns it
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* refactor(rust): prepare inference and auth foundations
* fix(rust): keep textract operations parsing from kebab-case model names
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* done
* refactor(types): derive Anthropic beta string conversions with Strum
* fix(anthropic): report missing max_tokens as a missing field
* refactor(rust): type Anthropic messages headers and auth after the Python layout
Delete anthropic/messages/headers.rs. Its OAuth handling, credential ladder
and beta merging move to anthropic/common_utils.rs where Python keeps them
(optionally_handle_anthropic_oauth, get_auth_header, _merge_beta_headers),
and the feature beta injection becomes update_headers_with_anthropic_beta on
the messages config, as in Python. The BaseAnthropicMessagesConfig impl is
unchanged apart from the bodies of validate_environment and request_headers
Beta values are now the AnthropicBeta enum and BetaSet, which sort, dedupe
and comma-join by construction. Request params gain typed speed, tools and
context_management through Recognized, so the beta logic matches on enums
instead of string-comparing JSON. OauthToken parses the sk-ant-oat token once
and the chat config shares that detection instead of its own copy
Case-insensitive header helpers move next to has_header in litellm-http.
One deliberate divergence: a Bearer-prefixed OAuth key configured through
api_key or ANTHROPIC_API_KEY is sent with a single Bearer scheme, where
Python would emit "Bearer Bearer"
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
* done
* fix(rust): repair test compilation and clippy failures
resolve auth before building the outbound request in prepare tests, give the host hook tests their own error type, and drop the disallowed reqwest client and err().expect() from core tests
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: Yujong Lee <yujong@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
* test(integration): run the Langfuse DB-callback test on its own scratch database
The test from #43282 wrote success_callback=langfuse and the LANGFUSE_* env
into the shared integration LiteLLM_Config. The suite's long-running gateway
reloads that table and only ever adds callbacks, so it kept exporting to the
test's closed Langfuse fake for the rest of the shard even after the rows were
restored. The owned proxy now gets a scratch database, which also removes the
snapshot/restore code. scratch_database moves into _support/database.py so
test_cache_and_quota and this test share one copy, and the stock-config guard
now checks the callback settings instead of the raw YAML text.
* test(integration): include failure_callback in the stock-config Langfuse guard
* refactor(rust): prepare inference and auth foundations
* fix(rust): keep textract operations parsing from kebab-case model names
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: Yujong Lee <yujong@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test: move key-gated tests/test_litellm SDK tests into tests/llm_translation and drop empty folders
* test: make token counter and health check unit tests run offline
* ci: point unit shards, rust path filter, Makefile and docs at tests/unit
* docs: fix stale test_litellm run paths in moved llm_translation tests
* fix: correct databricks e2e sys.path depth and contributing example path
---------
Co-authored-by: yuneng <yuneng@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(e2e): accept the otel cost write as a linked root trace
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(e2e): window and fail-closed the linked otel trace read-back
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(e2e): poll the otel read-back without recursion
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: yuneng <yuneng@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(integration): port langfuse callbacks-in-db coverage to the local harness
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(integration): assert the langfuse db rows after the exported span
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: yuneng <yuneng@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(callbacks-legacy-python): traverse and release the retained headers dict
LegacyLogging keeps the headers dict it hands to pre_call and post_call, but
its traverse never reported that edge to the collector and close never dropped
it. A cycle a callback builds through that dict could not be collected, and a
closed call kept the dict alive until the driver dropped the whole adapter.
Visit and clear headers like body, with regression tests for both
* refactor(callbacks-legacy-python): move the test support module into its own file
---------
Co-authored-by: Yujong Lee <yujong@berri.ai>
* feat(proxy): email alerts at configured percentages of a team member budget
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(alerting): label team member budget crossings as team member budget
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(auth): cover the team member alert dispatch from _check_team_member_budget
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(email): drop the emoji from the team member budget alert template
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(proxy): ignore team member alert thresholds outside 1 to 100 on both the backend and the dashboard
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(proxy): bound team member alert threshold key length before int parsing
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(integration): drop the legacy covers marker from the team member alert test
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(team): reject malformed team_member_max_budget_alert_emails on team writes
Thresholds outside 1-100, non-list recipients, and invalid emails now return 422 on
/team/new, /team/update and PATCH /team/{id} instead of being stored and silently
ignored. The value is stored canonically. Read-side LiteLLM_TeamTable is unchanged,
and the PATCH body stays a raw merge patch so a null threshold still deletes it.
* fix(auth): enforce and alert on team member budgets only in common_checks
The builder re-checked the team member budget inline before common_checks ran the same
check, so one request that crossed a team_member_max_budget_alert_emails threshold
dispatched two alerts. Drop the inline check; common_checks is the single authorization
point and already covers per-member rows, the team default member budget, zero-cost
skips and the cross-pod spend counter. Its 422 message now uses the TeamMember=user:team
form the builder and budget reservation already returned.
* Revert "fix(team): reject malformed team_member_max_budget_alert_emails on team writes"
This reverts commit 703e754b46.
* fix(alerting): keep BaseBudgetAlertType.get_event_message zero-arg
Requiring user_info broke existing callers and out-of-tree subclasses. The team member
label now comes from SlackAlerting.budget_alerts, so the interface and its Readme are
unchanged from main.
* fix(mcp): keep team member budget enforcement on the MCP OAuth auth dependency
The MCP OAuth dependency stops at _user_api_key_auth_builder and never reaches common_checks, so removing the builder's inline member budget check would have let over-budget members through there. Enforce it explicitly for that caller.
* fix(auth): keep main's team member budget enforcement, alert once per request
Restore the builder's team member budget check and 422 message exactly as on main and drop the MCP-only gate. The builder sends the member alert only on the request it rejects; common_checks sends it for requests that get past the builder, so no request alerts twice.
* test(integration): read team member alert deliveries without a shared accumulator
* test(integration): match team member alert deliveries by subject so other alerts cannot race the count
* refactor(proxy): build the team member alert threshold config without mutable collections
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* refactor(proxy): collapse the alert recipient isinstance checks into one call
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(integration): read the SMTP sink through lock-guarded snapshots and assert the exact deliveries
---------
Co-authored-by: ryan <ryan@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test: load the embedding base image from a committed 100x100 PNG instead of downloading it
* test: move the volcengine embedding test into tests/unit
* test: check gpt2 and r50k_base tokenizer parity against committed tiktoken reference files
* test: check hub tokenizer selection against an in-memory Hugging Face hub
* test: serve image URLs from respx in the gemini tool-result and format-param tests
* ci: drop the emptied legacy core-utils test path
* test: cover the cohere and anthropic tokenizer paths in the hub tokenizer test
* test: fetch every format-param image through respx and check its bytes reach the request
* test: drop the gpt2 and r50k_base parity tests, which no litellm path uses
* test: drop comments that restate assertions in the format-param test
test_update_config_success_callback_normalization replaced
proxy_server.proxy_logging_obj with a MagicMock and never restored it.
Since the proxy unit tests joined tests/unit (#42903), 14 JWT mapping,
end-user and MCP tests on the same xdist worker awaited that mock and
failed. The test now uses monkeypatch.
test_prometheus_logging_callbacks set verbose_logger to DEBUG and
litellm.set_verbose at import, so every worker in the unit job ran with
DEBUG on. That broke caplog equality in the JEV classifier test, the
vertex streaming memory ratio, and four event-loop lag checks. The
module-level setup is removed; nothing in the file depended on it.
#43081 removed the OCR harness modules but left them in the
importability parametrize list.
test_get_model_info_bedrock_region reassigned litellm.model_cost and set
LITELLM_LOCAL_MODEL_COST_MAP without restoring either, and never cleared
the get_model_info caches, so it failed whenever an earlier test had
looked up the regional model. It now uses monkeypatch and invalidates
the caches; the local_testing isolation fixture also invalidates them
after restoring model_cost.
The Windows job hit CircleCI's 10 minute no-output limit while cargo
compiles the Rust crates inside uv sync and uv build. Those two steps now
allow 30 minutes of silence.
* refactor(messages): take the provider client from the injected HTTP pool
The messages route kept its own process-wide reqwest client, so it ignored
ssl_verify, CA bundles, client certs, proxies and every other setting that
litellm-http resolves. The machine now takes the HttpClientPool and the
call's HttpClientConfig, as OCR does, and the bridge passes its shared pool.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* refactor(http): hand out an owned Client and move chat, audio and OIDC onto the pool
HttpClientPool now returns litellm_http::Client, a newtype only crates/http
can build, so every provider client carries the resolved TLS, proxy and
timeout settings. Chat completions and audio transcription drop their
process-wide reqwest clients and take the pool and call config like
messages; their 600s ceiling moves to the request. OidcResolver takes its
client instead of building one, and the bridge hands it the pooled one.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* refactor(secrets): build Google, Azure and CyberArk manager clients from the pool
The native secret managers built bare reqwest clients, so they ignored the
host's TLS and proxy settings. load_native_manager now takes the pool and
the host config and hands each manager a pooled client.
CyberArk's CYBERARK_SSL_VERIFY and CYBERARK_CLIENT_CERT/KEY become an
override on the host config instead of a hand-built client. To express a
certificate and key in separate files, HttpClientConfig::client_certificate
is now a ClientIdentity that is either one PEM or a split pair.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* chore(clippy): only crates/http may build a reqwest client
Fence reqwest::Client, ClientBuilder and the TLS builder methods with
disallowed-types and disallowed-methods so new code takes a
litellm_http::Client from the pool. crates/http is exempt as the one place
clients are built, and testkit as a dev-only installer. Tests move to
litellm_http::Client::plain_for_test or a pooled client.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(secrets-cyberark): keep verifying certificates when the host disables it
Python hands CyberArk its own ssl_verify, which wins over the global
setting, so CYBERARK_SSL_VERIFY unset or true still verifies even when the
host sets ssl_verify false. The pooled client copied the host's Disabled
and would send the API key unverified; fall back to the built-in roots
instead.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(python-bridge): treat a missing litellm package as no host HTTP settings
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: Yujong Lee <yujong@berri.ai>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(router): hold Responses lifecycle events until output so a pre-output fallback announces one response
* fix(router): narrow the responses wrapper close guards to Exception and test the hold helpers directly
* test(router): type the responses fallback test helpers
* fix(router): replay the held lifecycle events when the fallback stream fails before its first event
---------
Co-authored-by: mateo-berri <277851410+mateo-berri@users.noreply.github.com>
The legacy callback crate carried two rewrites that have nothing to do with the
Logging contract: litellm_credential_name inheritance and the max_budget and
num_retries_per_request checks. Any later callback host would need them
unchanged, which is the smell the crate's AGENTS.md now names. They are now a
Preflight the driver in litellm-host-python runs on the keyword view begin
returned, before the host projects from it, supplied by python-bridge and passed
through run_legacy_call. The call order is unchanged (setup, deployment hook,
credentials, limits) and a rejection still fails the call as a host failure, so
the failure callbacks run as before. The preflight rewrites the adapter's own
copy in place, so no extra dict copy and no new lifecycle method
Co-authored-by: Yujong Lee <yujong@berri.ai>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
* ci: run the unit_selection.sh shard files on every event instead of only fork pull requests
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* ci: rename fork-flag to unit-flag now that it applies on every event
* test: move tests/test_litellm root and small trees into tests/unit
Pure renames, no content changes. Follow-up commits in this PR fix
references, merge the three files that already existed in tests/unit,
keep live-provider tests in tests/test_litellm and wire CI.
* test: carry tests/test_litellm conftest isolation into tests/unit
Callback lists, routing fallbacks, cached HTTP clients, logger state, AWS,
proxy-URL and keychain env, and session-end client cleanup now reset for
unit tests too. The environment isolation owns its MonkeyPatch so a test's
own monkeypatch is undone before the model-cost teardown runs.
* test: merge, split and prune the moved root and small-tree tests
Merge batches/test_batch_utils.py and the chat_completions and messages
dispatch tests into the files that already existed in tests/unit. Keep
the live Gemini interactions tests, the async image-fetch format test and
the OpenAI embedding scorer test in tests/test_litellm since they need
real network or keys. Put test_router.py under tests/unit/test_router so
the existing package no longer shadows it. Delete eight tests the audit
found superseded by stronger ones kept in this move.
* ci: run the moved root and small-tree tests under their legacy flags
Add the misc and responses-caching-types flags to unit_selection.sh and
CircleCI, extend enterprise-routing and mcp-integration, and point the
legacy GHA shards, Makefile, redis-compat workflow, merge smoke manifest
and change classifier at the new paths.
* test: make the new tests/unit directories packages
tests/unit/test_package_layout.py requires every directory to carry an
__init__.py, and without one the moved and retained
test_litellm_responses_bridge.py modules collide on import.
* test: scope the unit socket block to tests/unit in shared sessions
The GHA shards collect the legacy test-path and the unit selection in one
pytest session. The unit conftest's loopback-only block leaked into legacy
modules that reach the network at import. The legacy conftest now lifts the
restriction at collect and setup time, and the unit conftest re-applies it
when collecting its own modules.
* test: move tests/test_litellm/llms into tests/unit/llms
Rename-only. Moves the provider tests and the fine-tuning fixtures they
load, mirroring the old paths. Follow-up commits merge, split and wire them.
* test: merge, split and prune the moved llms tests
Merges the Databricks chat transformation tests into the existing unit
file, keeps the tests that need real keys or the network in
tests/test_litellm, deletes the audited tests a stronger unit test
already covers, and points imports at tests.unit.llms.
* ci: run the moved llms tests under their legacy flags
The Vertex AI and All Other Providers shards keep their legacy test-path
for the retained files and add the llm-vertex-ai and llm-other-providers
unit selections. CircleCI gets matching unit jobs.
* test: make the tests/unit/llms directories packages
Adds __init__.py to the moved dirs and drops the legacy ones whose
directories no longer hold tests.
* test: drop script runners and path hacks the llms split left dangling
The __main__ runners in the split openai_like files and the Databricks e2e
runner called tests that now live in the other half of the split or were
deleted. The retained legacy halves also no longer need sys.path edits.
* test: give the shard-script tests their own GITHUB_OUTPUT
They only passed where the runner set it. The CircleCI unit job's env
allowlist drops it, so the script's redirect failed there.
* test: point the router and module-deletion checks at tests/unit
router_code_coverage and code_qa_check_tests only searched tests/test_litellm,
so the moved router tests no longer counted. The two silent-experiment tests
the audit deleted were the only direct callers of those methods; they are
replaced with tests that assert the forwarded shadow request and the
recursion guard.
* test: move tests/test_litellm integrations and secret_managers into tests/unit
Rename-only. Mirrors the old paths, including the directory conftests
and the prompt and JSON fixtures. Follow-up commits prune and wire them.
* test: prune and repoint the moved integrations tests
Deletes the 7 audited tests a stronger test in the same tree already
covers, imports the TLS sink helpers from their new conftest path, and
restores os.environ after each integrations test. Some presets write
OTEL_EXPORTER_OTLP_HEADERS straight into os.environ, and without the
legacy tree's test ordering that header leaked into the AgentOps tests.
* ci: run the moved integrations tests under their legacy flag
The integrations GHA shard and a new CircleCI job run the integrations
unit selection. secret_managers joins the misc selection.
* docs: point integrations and secret_managers references at tests/unit
* test: make the moved integrations directories packages
* test: keep the Databricks manual e2e runner and fix the SageMaker Nova run path
The Databricks e2e file is a manual script whose main() calls the tests
that were pruned, so pruning them broke the documented run. It is back to
its main version. The SageMaker Nova docstring now points at the file's
real location in tests/local_testing.
* test: move tests/test_litellm core utils, routing, responses, caching and rust_bridge into tests/unit
Rename-only. Mirrors the old paths, including fixtures, the stubtest config
and the native-route wheel script. Two files that collide with existing unit
files are merged in a follow-up commit.
* test: merge, prune and repoint the moved core, routing, responses, caching and rust_bridge tests
Merges the two files that collided with existing unit files, folding the
legacy extra case into test_is_chat_completion_cached_dict, and deletes the
9 audited tests a stronger test in the same file already covers.
Keeps what needs the network in tests/test_litellm: test_tokenizers pulls a
tokenizer from the Hugging Face hub, and the gpt2 and r50k_base tokenizer
cases download their BPE files. The unit core_utils conftest points
TIKTOKEN_CACHE_DIR at litellm's bundled encodings so the rest never depend on
import order to stay offline, and FakeSecretVault moves to a shared module
so both trees can build it.
* ci: run the moved core, routing, responses, caching and rust_bridge tests under their flags
core_utils gets a core-utils flag and CircleCI job, and its GHA shard keeps
the legacy path for the retained network tests. router_utils and
router_strategy join enterprise-routing, responses joins
responses-caching-types (minus responses/mcp, which mcp-integration owns),
caching joins caching-local and rust_bridge joins misc. The redis-compat,
test-rust, stubtest and merge-smoke paths follow the move.
* docs: point the Rust crate references at tests/unit
* test: make the moved core, routing and rust_bridge directories packages
* test: keep the no-loop DualCache batch_get_cache regression test
It runs the sync path outside any event loop, which the inside-loop test
cannot, so a change that picks the Redis client by loop state would only
show up there.
* test: keep the job's UNIT_FLAG out of the shard-script tests
* fix(url_utils): block 192.0.0.0/24 on every Python patch release
* test: move the new budget limiter tests into tests/unit/router_strategy
* test: move the new sentry scrubbing tests into tests/unit/litellm_core_utils
* test: move the new zerobus tests into tests/unit/integrations
* test: make tests/unit/integrations/zerobus a package
* test: load litellm's own tiktoken cache setup once instead of resetting it per test
---------
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
