- Add metadata mapping for documents during upload
- Update documents with metadata after upload in connector service
- Enhance metadata support in confluence and discord connectors
- Update sync data source to handle metadata properly
### What problem does this PR solve?
Confluence cannot retrieve updated files。
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Refine Confluence connector.
#10953
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
- [x] Refactoring