feat: Refactor rides app with unique constraints, mixins, and enhanced documentation

- Added migration to convert unique_together constraints to UniqueConstraint for RideModel.
- Introduced RideFormMixin for handling entity suggestions in ride forms.
- Created comprehensive code standards documentation outlining formatting, docstring requirements, complexity guidelines, and testing requirements.
- Established error handling guidelines with a structured exception hierarchy and best practices for API and view error handling.
- Documented view pattern guidelines, emphasizing the use of CBVs, FBVs, and ViewSets with examples.
- Implemented a benchmarking script for query performance analysis and optimization.
- Developed security documentation detailing measures, configurations, and a security checklist.
- Compiled a database optimization guide covering indexing strategies, query optimization patterns, and computed fields.

backend/apps/api/v1/accounts/views.py

@@ -1302,11 +1302,15 @@ def get_user_statistics(request):
     user = request.user
 
     # Calculate user statistics
+    # TODO(THRILLWIKI-104): Implement full user statistics tracking
+    from apps.parks.models import ParkReview
+    from apps.rides.models import RideReview
+
     data = {
-        "parks_visited": 0,  # TODO: Implement based on reviews/check-ins
-        "rides_ridden": 0,   # TODO: Implement based on reviews/check-ins
-        "reviews_written": 0,  # TODO: Count user's reviews
-        "photos_uploaded": 0,  # TODO: Count user's photos
+        "parks_visited": ParkReview.objects.filter(user=user).values("park").distinct().count(),
+        "rides_ridden": RideReview.objects.filter(user=user).values("ride").distinct().count(),
+        "reviews_written": ParkReview.objects.filter(user=user).count() + RideReview.objects.filter(user=user).count(),
+        "photos_uploaded": 0,  # TODO(THRILLWIKI-105): Implement photo counting
         "top_lists_created": TopList.objects.filter(user=user).count(),
         "member_since": user.date_joined,
         "last_activity": user.last_login,