Refactor async task handling

- Standardize async/poll usage with 'ASYNC_ENABLED | bool'
- Add async/poll parameters to Cloudflare, Nginx, Mailu, MIG, Nextcloud, and OpenLDAP tasks
- Update async configuration in 'group_vars/all/00_general.yml' to ensure boolean evaluation
- Allow CAA, cache, and DNS tasks to run asynchronously when enabled

https://chatgpt.com/share/689cd8cc-7fbc-800f-bd06-a667561573bf

roles/srv-proxy-6-6-domain/tasks/cloudflare/01_cleanup.yml

@@ -9,4 +9,5 @@
       purge_everything: true
     body_format: json
     return_content: yes
-  register: cf_purge
+  async: "{{ ASYNC_TIME if ASYNC_ENABLED | bool else omit }}"
+  poll:  "{{ ASYNC_POLL if ASYNC_ENABLED | bool else omit }}"

roles/srv-proxy-6-6-domain/tasks/cloudflare/02_enable_cf_dev_mode.yml

@@ -14,6 +14,7 @@
       Content-Type: "application/json"
     return_content: yes
   register: cf_dev_mode_current
+  when: ASYNC_ENABLED | bool
 
 - name: "Enable Cloudflare Development Mode"
   ansible.builtin.uri:
@@ -28,5 +29,8 @@
     return_content: yes
   register: cf_dev_mode_enable
   changed_when: >
+    ASYNC_ENABLED | bool and
     cf_dev_mode_current.json.result.value is defined and
     cf_dev_mode_current.json.result.value != 'on'
+  async: "{{ ASYNC_TIME if ASYNC_ENABLED | bool else omit }}"
+  poll:  "{{ ASYNC_POLL if ASYNC_ENABLED | bool else omit }}"