Fix Nextcloud Redis snapshot permissions and provisioning issues

- Create Redis data directory with correct ownership (UID 999) so Redis
  can write RDB snapshots; root-owned directory caused stop-writes-on-bgsave-error
  which crash-looped Nextcloud background jobs at 400%+ CPU

ansible/roles/nextcloud/tasks/main.yml

@@ -1,14 +1,20 @@
 ---
-- name: Create Nextcloud data directories
+- name: Create Nextcloud data directory
   ansible.builtin.file:
-    path: "{{ item }}"
+    path: "{{ nextcloud_data_dir }}"
     state: directory
     owner: root
     group: root
     mode: "0755"
-  loop:
-    - "{{ nextcloud_data_dir }}"
-    - "{{ nextcloud_data_dir }}/redis"
+  tags: nextcloud
+
+- name: Create Nextcloud Redis directory (redis UID 999)
+  ansible.builtin.file:
+    path: "{{ nextcloud_data_dir }}/redis"
+    state: directory
+    owner: "999"
+    group: "999"
+    mode: "0700"
   tags: nextcloud
 
 # www-data inside the container is UID 33. The html directory must be owned by

ansible/roles/nextcloud/templates/docker-compose.yml.j2

@@ -22,7 +22,7 @@ services:
     image: redis:7-alpine
     container_name: nextcloud-redis
     restart: unless-stopped
-    command: --save "" --loglevel warning
+    command: --save 60 1 --loglevel warning
     volumes:
       - {{ nextcloud_data_dir }}/redis:/data
     networks: