The test test_openai_compat_strips_message_level_reasoning_fields was added infbedf7aand incorrectly asserted that reasoning_content and extra_content should be stripped from messages. This contradicts the intent ofb5302b6which explicitly added these fields to _ALLOWED_MSG_KEYS to preserve them through sanitization. Rename the test and fix assertions to match the original design intent: reasoning_content and extra_content at message level should be preserved, and extra_content inside tool_calls should also be preserved. Signed-off-by: Lingao Meng <menglingao@xiaomi.com>