Add connection management scripts to package.json

- Introduced new scripts: check-connections and cleanup-connections for managing database connections.
- These scripts enhance the backend's ability to monitor and maintain connection health.

backend/package.json

@@ -10,6 +10,8 @@
     "start-daemon": "node daemonServer.js",
     "sync-db": "node sync-database.js",
     "sync-tables": "node sync-tables-only.js",
+    "check-connections": "node check-connections.js",
+    "cleanup-connections": "node cleanup-connections.js",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "keywords": [],