feat: Implement avatar upload system with Cloudflare integration

- Added migration to transition avatar data from CloudflareImageField to ForeignKey structure in UserProfile.
- Fixed UserProfileEvent avatar field to align with new avatar structure.
- Created serializers for social authentication, including connected and available providers.
- Developed request logging middleware for comprehensive request/response logging.
- Updated moderation and parks migrations to remove outdated triggers and adjust foreign key relationships.
- Enhanced rides migrations to ensure proper handling of image uploads and triggers.
- Introduced a test script for the 3-step avatar upload process, ensuring functionality with Cloudflare.
- Documented the fix for avatar upload issues, detailing root cause, implementation, and verification steps.
- Implemented automatic deletion of Cloudflare images upon avatar, park, and ride photo changes or removals.

backend/apps/moderation/services.py

@@ -7,7 +7,6 @@ from typing import Optional, Dict, Any, Union
 from django.db import transaction
 from django.utils import timezone
 from django.db.models import QuerySet
-from django.contrib.contenttypes.models import ContentType
 
 from apps.accounts.models import User
 from .models import EditSubmission, PhotoSubmission, ModerationQueue