Add 'Mark as Cleaned Up' functionality

- Add cleaned_at and cleaned_by_user_id fields to reports table
- Create database migration for cleanup tracking
- Add markAsCleaned backend endpoint and service method
- Add Mark as Cleaned Up button to ReportDetailModal
- Update types to include cleaned fields
- Add frontend handler to mark reports as cleaned

src/types/index.ts

@@ -43,6 +43,8 @@ export interface Report {
   updatedAt: Date;
   submittedAt: Date;
   verificationStatus: VerificationStatus;
+  cleanedAt?: Date;
+  cleanedByUserId?: string;
 }
 
 export interface CleanupEvent {