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>

src/routers/documents.py

@@ -64,12 +64,12 @@ async def receive_webhook(
     """
     from src.services.document_sync_service import DocumentSyncService
 
-    logger.info(f"Webhook received: document_id={payload.document_id}, event={payload.event}")
+    logger.info(f"Webhook received: document_id={payload.id}, title={payload.title}")
 
     settings = get_settings()
     if not settings.document_store_enabled:
         return WebhookResponse(
-            document_id=payload.document_id,
+            document_id=payload.id,
             status="skipped",
             indexed=False,
             message="Document store is disabled"
@@ -86,21 +86,23 @@ async def receive_webhook(
         )
 
         result = await sync_service.index_document(
-            document_id=payload.document_id,
-            user=user
+            document_id=payload.id,
+            user=user,
+            content=payload.content,  # Use content from webhook payload
+            title=payload.title,
         )
 
         return WebhookResponse(
-            document_id=payload.document_id,
+            document_id=payload.id,
             status="indexed" if result.success else "failed",
             indexed=result.success,
             message=result.error if not result.success else f"Indexed: {result.title}"
         )
 
     except Exception as e:
-        logger.error(f"Webhook processing failed for document {payload.document_id}: {e}", exc_info=True)
+        logger.error(f"Webhook processing failed for document {payload.id}: {e}", exc_info=True)
         return WebhookResponse(
-            document_id=payload.document_id,
+            document_id=payload.id,
             status="error",
             indexed=False,
             message=str(e)