Add Nextcloud deployment and management playbooks

- Introduced playbooks for health checks, Collabora updates, Nextcloud backups, upgrades, and Redis updates.
- Each playbook includes necessary tasks for managing services in a Docker environment.

nextcloud/redis_update.yml

@@ -0,0 +1,75 @@
+---
+- name: Update Redis (pull + recreate, same stack)
+  hosts: proxmox
+  become: true
+
+  vars:
+    nc_container: nextcloud
+    redis_container: redis
+    redis_image: "redis:7-alpine"
+    nc_root: /data/compose/nextcloud
+
+  tasks:
+    - name: Gather nextcloud container info (to learn project + network)
+      community.docker.docker_container_info:
+        name: "{{ nc_container }}"
+      register: nc_info
+
+    - name: Derive compose project & network
+      ansible.builtin.set_fact:
+        nc_project: "{{ nc_info.container.Config.Labels['com.docker.compose.project'] | default('nextcloud') }}"
+        nc_net_primary: "{{ (nc_info.container.NetworkSettings.Networks | default({})).keys() | list | first }}"
+      when: nc_info.exists
+
+    - name: Enable maintenance mode (optional safety)
+      community.docker.docker_container_exec:
+        container: "{{ nc_container }}"
+        user: "www-data"
+        command: php occ maintenance:mode --on
+      ignore_errors: true
+
+    - name: Render one-off compose for Redis
+      ansible.builtin.copy:
+        dest: /tmp/redis.yml
+        mode: '0644'
+        content: |
+          name: {{ nc_project }}
+          services:
+            redis:
+              image: {{ redis_image }}
+              container_name: {{ redis_container }}
+              restart: unless-stopped
+              networks: [cloud]
+              volumes:
+                - {{ nc_root }}/redis:/data
+          networks:
+            cloud:
+              external: true
+              name: {{ nc_net_primary }}
+
+    - name: Pull redis image
+      community.docker.docker_compose_v2:
+        project_name: "{{ nc_project }}"
+        files: ["/tmp/redis.yml"]
+        pull: always
+        state: present
+
+    - name: Recreate redis
+      community.docker.docker_compose_v2:
+        project_name: "{{ nc_project }}"
+        files: ["/tmp/redis.yml"]
+        recreate: always
+        state: present
+
+    - name: Disable maintenance mode (if we turned it on)
+      community.docker.docker_container_exec:
+        container: "{{ nc_container }}"
+        user: "www-data"
+        command: php occ maintenance:mode --off
+      ignore_errors: true
+
+    - name: Fire one cron tick (cleanup pending jobs)
+      community.docker.docker_container_exec:
+        container: "{{ nc_container }}"
+        user: "www-data"
+        command: php -f /var/www/html/cron.php