fix(monitoring): WeChat Work feedback recording bugs (#2108)

* fix(monitoring): fix WeChat Work feedback recording bugs

- Fix feedback events silently dropped when stream session expires:
  dispatch feedback handlers regardless of session availability
- Fix IntegrityError on repeated feedback (like→dislike) for same
  message: implement UPSERT logic in record_feedback()
- Fix cancel feedback (type=3) not removing records: add delete logic
- Fix inaccurate_reasons validation error: convert int reason codes
  to strings before creating FeedbackEvent (Pydantic expects List[str])
- Fix feedback timestamps 8 hours off in frontend: use parseUTCTimestamp
  instead of new Date() for UTC timestamp parsing
- Fix StreamSessionManager.cleanup missing _feedback_index cleanup

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(monitoring): apply ruff format to wecom feedback files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: 6mvp6 <13727783693@163.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/langbot/pkg/platform/sources/wecombot.py

@@ -328,6 +328,9 @@ class WecomBotAdapter(abstract_platform_adapter.AbstractMessagePlatformAdapter):
             feedback_type = kwargs.get('feedback_type', 0)
             feedback_content = kwargs.get('feedback_content', '') or None
             inaccurate_reasons = kwargs.get('inaccurate_reasons', []) or None
+            # WeChat Work returns integer reason codes, but FeedbackEvent expects strings
+            if inaccurate_reasons:
+                inaccurate_reasons = [str(r) for r in inaccurate_reasons]
             session = kwargs.get('session')
 
             session_id = None