Add comprehensive processing logging system

- Added database logging to all major processing tasks
- Created API endpoints for retrieving processing logs
- Updated frontend to display processing logs per file
- Logging includes: process_document, convert_to_pdf, extract_metadata_with_gpt, embed_metadata_into_pdf, finalize_document_storage, send_to_all_destinations

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

app/api/__init__.py

@@ -14,6 +14,7 @@ from app.api.dropbox import router as dropbox_router
 from app.api.openai import router as openai_router
 from app.api.azure import router as azure_router
 from app.api.google_drive import router as google_drive_router
+from app.api.logs import router as logs_router
 
 # Set up logging
 logger = logging.getLogger(__name__)
@@ -31,3 +32,4 @@ router.include_router(dropbox_router)
 router.include_router(openai_router)
 router.include_router(azure_router)
 router.include_router(google_drive_router)
+router.include_router(logs_router)