monica: add backup script

roles/monica/tasks/main.yml

@@ -43,3 +43,11 @@
     chdir: '/etc/monica'
     cmd: 'docker compose up -d --remove-orphans'
   when: 'res.changed'
+
+- name: Ensure backup script is present
+  ansible.builtin.copy:
+    src: 'monica.backup.sh'
+    dest: '/etc/backups/monica.backup.sh'
+    owner: 'root'
+    group: 'root'
+    mode: '0644'