Refactor API structure and add comprehensive user management features

- Restructure API v1 with improved serializers organization
- Add user deletion requests and moderation queue system
- Implement bulk moderation operations and permissions
- Add user profile enhancements with display names and avatars
- Expand ride and park API endpoints with better filtering
- Add manufacturer API with detailed ride relationships
- Improve authentication flows and error handling
- Update frontend documentation and API specifications

backend/apps/api/v1/signals.py

@@ -10,7 +10,13 @@ from django.dispatch import receiver
 from django.core.cache import cache
 
 from apps.parks.models import Park, ParkReview, ParkPhoto, Company as ParkCompany
-from apps.rides.models import Ride, RollerCoasterStats, RideReview, RidePhoto, Company as RideCompany
+from apps.rides.models import (
+    Ride,
+    RollerCoasterStats,
+    RideReview,
+    RidePhoto,
+    Company as RideCompany,
+)
 
 
 def invalidate_stats_cache():
@@ -23,6 +29,7 @@ def invalidate_stats_cache():
     cache.delete("platform_stats")
     # Also update the timestamp for when stats were last invalidated
     from datetime import datetime
+
     cache.set("platform_stats_timestamp", datetime.now().isoformat(), 300)