refactor postgres functions to not rely on the packages

app/package.json

@@ -99,6 +99,7 @@
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.2.0",
     "@types/node": "^24.10.0",
+    "@types/pg": "^8.15.6",
     "@types/react": "^19.0.10",
     "@types/react-dom": "^19.0.4",
     "@vitejs/plugin-react": "^5.1.0",
@@ -110,15 +111,17 @@
     "jotai": "^2.12.2",
     "jsdom": "^26.1.0",
     "kysely-generic-sqlite": "^1.2.1",
-     "kysely-postgres-js": "^2.0.0",
+    "kysely-postgres-js": "^2.0.0",
     "libsql": "^0.5.22",
     "libsql-stateless-easy": "^1.8.0",
     "miniflare": "^4.20251011.2",
     "open": "^10.2.0",
     "openapi-types": "^12.1.3",
+    "pg": "^8.16.3",
     "postcss": "^8.5.3",
     "postcss-preset-mantine": "^1.18.0",
     "postcss-simple-vars": "^7.0.1",
+    "postgres": "^3.4.7",
     "posthog-js-lite": "^3.6.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
@@ -143,20 +146,10 @@
   "optionalDependencies": {
     "@hono/node-server": "^1.19.6"
   },
-   "peerDependencies": {
-      "react": ">=19",
-      "react-dom": ">=19",
-      "pg": "*",
-      "postgres": "*"
-   },
-   "peerDependenciesMeta": {
-      "pg": {
-         "optional": true
-      },
-      "postgres": {
-         "optional": true
-      }
-   },
+  "peerDependencies": {
+    "react": ">=19",
+    "react-dom": ">=19"
+  },
   "main": "./dist/index.js",
   "module": "./dist/index.js",
   "types": "./dist/types/index.d.ts",