get_sanitized_user_information_from_key copied UserAPIKeyAuth.metadata
verbatim into user_api_key_auth_metadata, so the key's callback
configuration - including the integration credentials inside callback_vars -
reached the StandardLoggingPayload every integration receives. The two other
sites that stamp key/team metadata into request metadata did the same.
Sanitize at those sources with strip_callback_config, which drops the
`logging` and `callback_settings` slots and leaves everything else (notably
`priority`, read back by the dynamic rate limiter) untouched. Those slots are
resolved from UserAPIKeyAuth during pre-call setup and never read off the
logged copies, so nothing downstream loses input.
This makes the scrub in scrub_sensitive_keys_in_metadata dead - it only
matched the string "logging" under one of the two field names and never
covered callback_settings - so it is removed.
Separately, LangSmith set the run's `inputs` to the raw StandardLoggingPayload
while redacting only `extra`, so redact_user_api_key_info left every
user_api_key_* field in inputs.metadata. Both now go through one
_redact_metadata helper, which also covers the nested requester_metadata copy.
LangSmith reads the Cost column from outputs.usage_metadata.total_cost,
but LangsmithLogger._prepare_log_data never wrote to that key. The
response_cost was already computed in StandardLoggingPayload but was
not forwarded to the outputs dict.
Inject usage_metadata with input_tokens, output_tokens, total_tokens,
and total_cost into the outputs dict so LangSmith can display cost.
Fixes#24001
Made-with: Cursor
