fix: update Paperless webhook payload to match include_document format

- Change model field from document_id to id (Paperless sends id)
- Add content, created, modified, added, original_file_name, owner fields
- Add extra="ignore" config to handle additional Paperless fields
- Update sync service to use content from webhook payload
- Skip Paperless API call when content already provided

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "library-desk"
-version = "1.4.5"
+version = "1.4.6"
 description = "Coordination service for The Library system - HybridRAG queries, document ingestion, entity extraction, and knowledge consolidation"
 readme = "README.md"
 requires-python = ">=3.12"