Enable sigvild-gallery role and backup functionality

- Enable sigvild-gallery role in site.yml playbook
- Add backup configuration to host variables
- Integrate restore functionality into main sigvild-gallery tasks
- Add data protection logic to prevent accidental overwrites
- Enable gitea role for complete service deployment

This completes the sigvild-gallery service integration with backup/restore capabilities.

site.yml

@@ -19,9 +19,9 @@
     #   tags: ['caddy', 'infrastructure', 'web']
     
     # Application services  
+    - role: sigvild-gallery
+      tags: ['sigvild', 'gallery', 'wedding']
     - role: authentik
       tags: ['authentik']
-    # - role: gitea
-    #   tags: ['gitea', 'git', 'development']
-    # - role: sigvild-gallery
-    #   tags: ['sigvild', 'gallery', 'wedding']
+    - role: gitea
+      tags: ['gitea', 'git', 'development']