[bot] LiteLLM: `amoderation()` async variant not instrumented

[braintrust-bot]

Summary

The Braintrust LiteLLM integration instruments litellm.moderation() (sync) but not litellm.amoderation() (async). This is the only LiteLLM function where the async variant is missing — every other instrumented function has both sync and async patchers.

LiteLLM exposes amoderation() as a documented async function (confirmed via LiteLLM source and recent bug fix PR). Calls to litellm.amoderation() produce zero Braintrust tracing.

What is missing

No tracing span is created when users call litellm.amoderation() through either wrap_litellm() or patch_litellm().

Current async parity in py/src/braintrust/integrations/litellm/patchers.py:

Function	Sync Patcher	Async Patcher
completion / acompletion	Yes	Yes
responses / aresponses	Yes	Yes
image_generation / aimage_generation	Yes	Yes
embedding / aembedding	Yes	Yes
speech / aspeech	Yes	Yes
transcription / atranscription	Yes	Yes
rerank / arerank	Yes	Yes
moderation / amoderation	Yes	No

The fix requires:

• Adding _amoderation_wrapper_async to tracing.py (mirroring the existing _moderation_wrapper)
• Adding LiteLLMAmoderationPatcher to patchers.py
• Adding it to _ALL_LITELLM_PATCHERS

Braintrust docs status

The Braintrust LiteLLM integration docs do not specifically mention moderation support.

Upstream sources

• LiteLLM moderation docs: https://docs.litellm.ai/docs/moderation
• LiteLLM amoderation() confirmed via: Fix: Moderations endpoint now respects api_base configuration parameter BerriAI/litellm#16087

Local files inspected

• py/src/braintrust/integrations/litellm/patchers.py — LiteLLMModerationPatcher exists (sync only); no LiteLLMAmoderationPatcher
• py/src/braintrust/integrations/litellm/tracing.py — _moderation_wrapper exists; no _amoderation_wrapper_async
• py/src/braintrust/integrations/litellm/test_litellm.py — no async moderation tests
• Grep for amoderation across py/src/braintrust/integrations/litellm/ returns zero matches

Relationship to existing issues

• LiteLLM: patch_litellm() does not patch embedding or moderation; aembedding missing entirely #115 (closed) originally noted amoderation as missing alongside aembedding. The aembedding gap was fixed (patcher now exists), but amoderation was not added during the integration refactor from py/src/braintrust/wrappers/ to py/src/braintrust/integrations/.
• [bot] LiteLLM: text_completion() / atext_completion() not instrumented #401 tracks the separate text_completion/atext_completion gap.