Initial commit: AutonetSellCar platform with deployment system

- Frontend: Next.js 14 with TypeScript
- Backend: FastAPI with SQLAlchemy
- Agent: Carmodoo sync agent
- Deployment: Docker Compose based staging/production setup
- Scripts: Automated deployment with rollback support

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

backend/check_api_schema.py

@@ -0,0 +1,11 @@
+import urllib.request
+import json
+
+with urllib.request.urlopen("http://localhost:8000/openapi.json") as response:
+    data = json.loads(response.read().decode())
+
+props = data['components']['schemas']['CarmodooSearchResultItem']['properties']
+print("Properties in CarmodooSearchResultItem:")
+for p in props.keys():
+    print(f"  - {p}")
+print(f"\ncheck_num present: {'check_num' in props}")