chore: convert submodules to standard directories for true monorepo structure

vibn-frontend/scripts/db-setup.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+# Run database migrations at container startup
+# This ensures DATABASE_URL is available from Coolify env vars
+
+echo "Running Prisma DB setup..."
+npx prisma db push --accept-data-loss --skip-generate
+echo "Database setup complete!"