feat(deploy): add adult verification directory creation and permissions setup

- Enhanced deploy-backend.sh and update-backend.sh to create the adult verification directory under /opt/yourpart-data.
- Updated permissions for the new directory to ensure proper access control.
- Refactored file path handling in AdminService and SettingsService to utilize the new directory structure for adult verification files.

deploy-backend.sh

@@ -25,6 +25,7 @@ sudo rm -rf /opt/yourpart/backend
 
 echo "Erstelle Backend-Verzeichnis..."
 sudo mkdir -p /opt/yourpart/backend
+sudo mkdir -p /opt/yourpart-data/adult-verification
 
 echo "Kopiere neues Backend..."
 sudo cp -r * /opt/yourpart/backend/
@@ -33,6 +34,8 @@ sudo cp -r * /opt/yourpart/backend/
 echo "Setting permissions..."
 sudo chown -R yourpart:yourpart /opt/yourpart/backend
 sudo chmod -R 755 /opt/yourpart/backend
+sudo chown -R yourpart:yourpart /opt/yourpart-data
+sudo chmod -R 755 /opt/yourpart-data
 
 # .env-Datei kopieren (falls vorhanden)
 if [ -f .env ]; then