chore: move to postgres

Author: atinux

playground/package.json

@@ -27,7 +27,7 @@
     "ioredis": "^5.8.2",
     "nuxt": "4.1.3",
     "nuxt-auth-utils": "^0.5.25",
-    "pg": "^8.16.3",
+    "postgres": "^3.4.7",
     "tailwindcss": "^4.1.16",
     "workers-ai-provider": "^2.0.0",
     "zod": "^4.1.12"