fix: switch to full node_modules in runner to resolve prisma CLI dependencies

Removes standalone build to allow prisma CLI to run migrations at startup.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

next.config.mjs

@@ -1,6 +1,4 @@
 /** @type {import('next').NextConfig} */
-const nextConfig = {
-  output: "standalone",
-};
+const nextConfig = {};
 
 export default nextConfig;