Enhanced quarterly confirmation system with approval workflow and export improvements

Features added:
- ✅ Fixed quarterly confirmation approval system with URL pattern
- ✅ Added re-approval and status reset functionality for quarterly confirmations
- ✅ Synchronized quarterly approval status with support payment system
- ✅ Enhanced Destinataer export with missing fields (anrede, titel, mobil)
- ✅ Added quarterly confirmation data and documents to export system
- ✅ Fixed address field display issues in destinataer template
- ✅ Added quarterly statistics dashboard to support payment lists
- ✅ Implemented duplicate support payment prevention and cleanup
- ✅ Added visual indicators for quarterly-linked support payments

Technical improvements:
- Enhanced create_quarterly_support_payment() with duplicate detection
- Added get_related_support_payment() method to VierteljahresNachweis model
- Improved quarterly confirmation workflow with proper status transitions
- Added computed address property to Destinataer model
- Fixed template field mismatches (anrede, titel, mobil vs strasse, plz, ort)
- Enhanced backup system with operation tracking and cancellation

Workflow enhancements:
- Quarterly confirmations now properly sync with support payments
- Single support payment per destinataer per quarter (no duplicates)
- Approval button works for both eingereicht and geprueft status
- Reset functionality allows workflow restart
- Export includes complete quarterly data with uploaded documents

compose.dev.yml

@@ -39,8 +39,6 @@ services:
       - LANGUAGE_CODE=de
       - TIME_ZONE=Europe/Berlin
       - REDIS_URL=redis://redis:6379/0
-      - SESSION_COOKIE_NAME=stiftung_sessionid
-      - CSRF_COOKIE_NAME=stiftung_csrftoken
       - PAPERLESS_API_URL=http://paperless:8000
       - PAPERLESS_API_TOKEN=d477152aca264ea00620910ac09a06f0a4faaecc
       - PAPERLESS_REQUIRED_TAG=Stiftung_Destinatäre
@@ -56,9 +54,7 @@ services:
     command: ["python", "manage.py", "runserver", "0.0.0.0:8000"]
 
   paperless:
-    build:
-      context: ./paperless
-      dockerfile: Dockerfile
+    image: ghcr.io/paperless-ngx/paperless-ngx:latest
     ports:
       - "8082:8000"
     environment: