chore: add deployment scripts for production

- Add db:indexes script to create performance indexes
- Add deploy script that runs full deployment pipeline
- Simplify production deployment to single command

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

package.json

@@ -11,7 +11,9 @@
     "preview": "cd src/frontend && bun run preview",
     "db:generate": "drizzle-kit generate",
     "db:push": "drizzle-kit push",
-    "db:migrate": "drizzle-kit migrate"
+    "db:migrate": "drizzle-kit migrate",
+    "db:indexes": "bun src/backend/migrations/add-performance-indexes.js",
+    "deploy": "bun install && bun run db:push && bun run db:indexes && bun run build"
   },
   "devDependencies": {
     "@types/bun": "latest",