3683cbfc13
The legacy BaseChatModel.astream path does not forward run_manager to _astream, so the per-call tracing run_id was unreachable and the stream fell back to the conversation run_id, which the gateway's verify_model_attempt rejected (401 RUN_ATTEMPT_NOT_ACCEPTED). Publish the tracing run_id into the shared configurable dict from on_chat_model_start and read it back in _attempt_id.