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- Updated moderation and parks migrations to remove outdated triggers and adjust foreign key relationships.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/accounts/tests/test_user_deletion.py

@@ -117,7 +117,7 @@ class UserDeletionServiceTest(TestCase):
         # For now, we'll test the basic functionality
 
         # Create deleted user first to ensure it exists
-        deleted_user = UserDeletionService.get_or_create_deleted_user()
+        UserDeletionService.get_or_create_deleted_user()
 
         # Delete the test user
         result = UserDeletionService.delete_user_preserve_submissions(self.user)
@@ -143,7 +143,7 @@ class UserDeletionServiceTest(TestCase):
         with self.assertRaises(Exception):
             with transaction.atomic():
                 # Start the deletion process
-                deleted_user = UserDeletionService.get_or_create_deleted_user()
+                UserDeletionService.get_or_create_deleted_user()
 
                 # Simulate an error
                 raise Exception("Simulated error during deletion")