feat(rides): populate slugs for existing RideModel records and ensure uniqueness

- Added migration 0011 to populate unique slugs for existing RideModel records based on manufacturer and model names.
- Implemented logic to ensure slug uniqueness during population.
- Added reverse migration to clear slugs if needed.

feat(rides): enforce unique slugs for RideModel

- Created migration 0012 to alter the slug field in RideModel to be unique.
- Updated the slug field to include help text and a maximum length of 255 characters.

docs: integrate Cloudflare Images into rides and parks models

- Updated RidePhoto and ParkPhoto models to use CloudflareImagesField for image storage.
- Enhanced API serializers for rides and parks to support Cloudflare Images, including new fields for image URLs and variants.
- Provided comprehensive OpenAPI schema metadata for new fields.
- Documented database migrations for the integration.
- Detailed configuration settings for Cloudflare Images.
- Updated API response formats to include Cloudflare Images URLs and variants.
- Added examples for uploading photos via API and outlined testing procedures.

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

@@ -141,6 +141,12 @@ class ParkPhotoViewSet(ModelViewSet):
         park_id = self.kwargs.get("park_pk")
         if not park_id:
             raise ValidationError("Park ID is required")
+
+        try:
+            park = Park.objects.get(pk=park_id)
+        except Park.DoesNotExist:
+            raise ValidationError("Park not found")
+
         try:
             # Use the service to create the photo with proper business logic
             service = cast(Any, ParkMediaService())