fix: optimize compliance scan performance and improve error handling

- Refactor scan_compliance to eliminate N+1 queries using joinedload and batch loading
- Add try-except wrapper in compliance scan API endpoint
- Improve frontend axios error interceptor to display detail/message/timeout errors
- Update CORS config and nginx for domain deployment

docker-compose.prod.yml

@@ -78,6 +78,9 @@ services:
     container_name: pdg-frontend
     ports:
       - "80:80"
+      - "443:443"
+    volumes:
+      - ./ssl:/etc/nginx/ssl:ro
     depends_on:
       - backend
     restart: unless-stopped