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.

roles/sigvild-gallery/tasks/main.yml

@@ -26,6 +26,47 @@
     - "{{ sigvild_gallery_data_dir }}"
     - "{{ sigvild_gallery_web_root }}"
 
+- name: Check for existing gallery data
+  stat:
+    path: "{{ sigvild_gallery_data_dir }}/data.db"
+  register: existing_gallery_data
+  tags: [restore, backend]
+
+- name: Check for available backup files
+  local_action:
+    module: find
+    paths: "{{ sigvild_gallery_backup_local_path }}"
+    patterns: "sigvild-gallery-backup-*.tar.gz"
+  register: backup_files
+  become: false
+  when: sigvild_gallery_backup_enabled | default(false)
+  tags: [restore, backend]
+
+- name: Initialize backup_files when backup disabled
+  set_fact:
+    backup_files: {"files": []}
+  when: not (sigvild_gallery_backup_enabled | default(false))
+
+- name: Restore from backup if no data exists and backups available
+  include_tasks: restore.yml
+  when:
+    - sigvild_gallery_backup_enabled | default(false)
+    - backup_files.files | length > 0
+    - not existing_gallery_data.stat.exists
+  tags: [restore, backend]
+
+- name: Skip restore - existing data found
+  debug:
+    msg: 
+      - "ℹ️ Existing gallery data found at {{ sigvild_gallery_data_dir }}/data.db"
+      - "Skipping restore to preserve existing data"
+      - "To force restore, manually remove existing data first"
+  when:
+    - sigvild_gallery_backup_enabled | default(false)
+    - backup_files.files | length > 0 
+    - existing_gallery_data.stat.exists
+  tags: [restore, backend]
+
 - name: Build and deploy backend
   include_tasks: deploy_backend.yml
   tags: [backend, build]