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>