* refactor(passthrough_endpoints-success-handler): refactor llm passthrough logging logic
isolate the llm translation work to enable cost tracking on sdk
* feat: initial implementation of passthrough SDK cost calculation
enables bedrock passthrough cost tracking to work
* feat(cost_calculator.py): working cost calculation for bedrock passthrough
* feat(litellm_logging.py): consider allm_passthrough in cost tracking
allows async calls (e.g. via proxy) to work
* feat(bedrock/passthrough): working event stream decoding for bedrock passthrough calls + logging instrumentation for passthrough sdk calls (log on stream completion)
Enables bedrock streaming cost calculation
* feat(litellm_logging.py): support streaming passthrough cost tracking
* feat(passthrough/main.py): working async streaming cost calculation
Closes https://github.com/BerriAI/litellm/issues/11359
* feat(proxy_server.py): fix passthrough routing when llm router enabled
* feat: further fixes
* feat(bedrock/): working bedrock passthrough cost tracking (non-streaming)
* feat(litellm_logging.py): working usage tracking for bedrock passthrough calls
ensures tokens are logged
* feat(bedrock/passthrough): add converse passthrough cost tracking support
* feat(base_llm/passthrough): remove redundant function
* refactor(litellm_logging.py): refactor function to be below 50 LOC
* test: update test
* test: remove redundant test
* fix(litellm_pre_call_utils.py): add user agent tags to spend logs in standard logging payload logic
avoid clash when tag based routing is enabled
* test: remove redundant test
* test: rename oidc test to run earlier
quicker debuging
* fix(azure.py): return more detailed error message
* fix(azure/common_utils.py): use default scope, if scope is none
fixes oidc test
* fix: always default to cognitiveservices.azure.com
* test: update test
* fix(utils.py): support non default params for audio transcription
allows passing provider specific params straight through on transcription calls
* fix(gpt_transformation.py): fix o_series model routing
call _transform_request on async event
* refactor: refactor tests
* test(test_azure_chat_o_series_transformation.py): add unit test for azure o series error
* test: update test
* test: update json
* fix: fix mutiple keyword error
