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b680065c45
Removed `print` statements from the `LLMStreamChunkEvent` handler to prevent LLM response chunks from being written directly to stdout. The listener now only tracks chunks internally. Fixes #3715 Added explicit return statements for trace-related tests. Updated cassette for `test_failed_evaluation` to reflect new behavior where an empty trace dict is used instead of returning early. Ensured deterministic cleanup order in test fixtures by making `clear_event_bus_handlers` depend on `setup_test_environment`. This guarantees event bus shutdown and file handle cleanup occur before temporary directory deletion, resolving intermittent “Directory not empty” errors in CI.