Add staging environment documentation and minor fixes

- Document staging vs production DB separation (autonet_staging)
- Add staging sync and deployment commands to CLAUDE.md
- Update changelog with 2025-01-03 changes

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

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

backend/app/api/carmodoo.py

@@ -16,7 +16,7 @@ from pathlib import Path
 from lxml import etree
 from lxml import html as lxml_html
 from ..database import get_db
-from ..models import Car, CarMaker, CarModel, CarImage, CarOption, CarPerformanceCheck, CarSpecification, PerformanceCheckView, CarView, User
+from ..models import Car, CarMaker, CarModel, CarImage, CarOption, CarPerformanceCheck, CarSpecification, PerformanceCheckView, CarView, User, VehicleRequest, RequestVehicle
 from ..models.settings import SystemSettings
 from ..api.auth import get_current_user, get_current_user_optional, get_current_admin_user
 from ..services.cache_service import CacheService
@@ -1712,7 +1712,14 @@ async def get_car_performance_check(
                 CarView.car_id == car_id
             ).first()
 
-            has_access = (existing_perf_view is not None) or (existing_car_view is not None)
+            # Check 3: This car was recommended to the user (paid 1 CC for recommendation)
+            recommended_vehicle = db.query(RequestVehicle).join(VehicleRequest).filter(
+                VehicleRequest.user_id == current_user.id,
+                RequestVehicle.car_id == car_id,
+                RequestVehicle.is_approved == True
+            ).first()
+
+            has_access = (existing_perf_view is not None) or (existing_car_view is not None) or (recommended_vehicle is not None)
 
     # If no access, return only basic info (that performance check exists)
     if not has_access: