test: adapt picked tests to stable/1.84.x fixture surface

Three test-only adaptations required by the picks, none touching
production code: restore the AsyncMock import that the upstream
test_proxy_cli.py carries; drop three patch() entries targeting
seed_request_identity, a helper that does not exist on this line; and
re-graft the #30160 test block verbatim from the upstream hunk so the
@patch decorators are included

tests/test_litellm/proxy/auth/test_auth_exception_handler.py

@@ -144,9 +144,6 @@ async def test_handle_authentication_error_db_infra_error_returns_503(db_error):
             new_callable=AsyncMock,
             return_value=None,
         ),
-        patch(
-            "litellm.proxy.auth.auth_exception_handler.seed_request_identity",
-        ),
         patch(
             "litellm.proxy.proxy_server.general_settings",
             {"allow_requests_on_db_unavailable": False},
@@ -201,9 +198,6 @@ async def test_handle_authentication_error_prisma_engine_teardown_returns_503():
             new_callable=AsyncMock,
             return_value=None,
         ),
-        patch(
-            "litellm.proxy.auth.auth_exception_handler.seed_request_identity",
-        ),
         patch(
             "litellm.proxy.proxy_server.general_settings",
             {"allow_requests_on_db_unavailable": False},
@@ -251,9 +245,6 @@ async def test_handle_authentication_error_genuine_auth_failure_stays_401(auth_e
             new_callable=AsyncMock,
             return_value=None,
         ),
-        patch(
-            "litellm.proxy.auth.auth_exception_handler.seed_request_identity",
-        ),
         patch(
             "litellm.proxy.proxy_server.general_settings",
             {"allow_requests_on_db_unavailable": False},

tests/test_litellm/proxy/pass_through_endpoints/llm_provider_handlers/test_anthropic_passthrough_logging_handler.py

@@ -321,6 +321,7 @@ class TestAzureAnthropicCostCalculation:
         assert call_kwargs["model"] == "azure_ai/claude-sonnet-4-5_gb_20250929"
         assert call_kwargs["custom_llm_provider"] == "azure_ai"
 
+    @patch("litellm.completion_cost")
     def test_cost_calculation_resolves_unknown_model_from_litellm_params(
         self, mock_completion_cost
     ):
@@ -583,6 +584,7 @@ class TestAzureAnthropicCostCalculation:
             == "claude-3-5-haiku-20241022"
         )
 
+
 class TestAnthropicBatchPassthroughCostTracking:
     """Test cases for Anthropic batch passthrough cost tracking functionality"""
 

tests/test_litellm/proxy/test_proxy_cli.py

@@ -1,6 +1,6 @@
 import os
 import sys
-from unittest.mock import MagicMock, patch
+from unittest.mock import AsyncMock, MagicMock, patch
 
 import fastapi
 import pytest