chore: remove clerk, vercel, netlify, mongodb residues

package.json

@@ -16,7 +16,6 @@
     "@tailwindcss/postcss": "^4.1.18",
     "@types/mongoose": "^5.11.96",
     "@types/uuid": "^10.0.0",
-    "@vercel/speed-insights": "^1.3.1",
     "axios": "^1.13.2",
     "bcryptjs": "^3.0.3",
     "clsx": "^2.1.1",
@@ -28,8 +27,6 @@
     "express": "^5.2.1",
     "jsonwebtoken": "^9.0.3",
     "lucide-react": "^0.562.0",
-    "mongodb": "^7.0.0",
-    "mongoose": "^9.1.5",
     "multer": "^2.0.2",
     "pdf-parse": "^1.1.1",
     "prop-types": "^15.8.1",
@@ -54,7 +51,6 @@
     "@types/node": "^24.10.1",
     "@types/react": "^19.2.5",
     "@types/react-dom": "^19.2.3",
-    "@vercel/node": "^5.5.28",
     "@vitejs/plugin-react": "^5.1.1",
     "autoprefixer": "^10.4.23",
     "concurrently": "^9.1.2",