fix(GRO-1395): add drizzle-orm and postgres to root package.json

Add drizzle-orm ^0.38.4 and postgres ^3.4.5 to root package.json
dependencies so that pnpm --frozen-lockfile install in CI makes
them available at the root node_modules level.

apps/api is not a pnpm workspace member (workspace declares
packages: ["apps/*"]), so CI's pnpm install does not reach into
apps/api/node_modules/. Adding these deps to the root package.json
fixes the ERR_MODULE_NOT_FOUND error that Vitest encountered when
running tests under pnpm --frozen-lockfile.

Also moves drizzle-orm and postgres from apps/api/devDependencies
to dependencies per the issue spec.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

package.json

@@ -19,9 +19,11 @@
     "@hono/node-server": "^1.13.7",
     "@hono/zod-validator": "^0.7.6",
     "better-auth": "^1.5.6",
+    "drizzle-orm": "^0.38.4",
     "hono": "^4.6.17",
     "node-cron": "^3.0.3",
     "nodemailer": "^6.9.16",
+    "postgres": "^3.4.5",
     "stripe": "^22.0.0",
     "telnyx": "^1.23.0",
     "zod": "^4.3.6"