Refactor: Implement milestone moderation fixes

src/lib/moderation/entities.ts

@@ -212,6 +212,9 @@ export function getSubmissionTypeLabel(submissionType: string): string {
     property_owner: 'Property Owner',
     ride_model: 'Ride Model',
     photo: 'Photo',
+    photo_delete: 'Photo Deletion',
+    milestone: 'Timeline Event',
+    timeline_event: 'Timeline Event',
     review: 'Review',
   };