Fix runner stage: copy full node_modules for Prisma CLI

Cherry-picking modules missed @prisma/engines and other required
binaries. Copy the entire node_modules to runner to ensure
prisma migrate deploy works correctly.

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

entrypoint.sh

@@ -2,7 +2,7 @@
 set -e
 
 echo "Running database migrations..."
-npx prisma migrate deploy
+node /app/node_modules/.bin/prisma migrate deploy
 
 echo "Starting Next.js..."
 exec node server.js