Document 5 key issues that Core team needs to diagnose:
1. get_pipeline_stats API data accuracy (HIGH)
2. sync_file_status API state updates (HIGH)
3. Pipeline progress calculation logic (MEDIUM)
4. Pipeline stages initialization (MEDIUM)
5. File processing error handling (MEDIUM)
Includes:
- Test commands for API diagnosis
- Expected response formats
- Verification checklist
- Diagnostic steps
Related: Studio team fixes in previous commit