Nextcloud: async overhaul & task refactor (conditional wait, faster polling)

• Add config.performance.async.wait_for and expose as nextcloud_wait_for_async_enabled to toggle waiting for async jobs.

• Split system/admin/index maintenance into separate tasks: 02_add_missing_indices.yml, 03_admin.yml, 04_system_config.yml.

• Refactor plugin flow: rename 02_plugin→05_plugin, 03_plugin_routines→06_plugin_routines, 04_plugin_enable_and_configure→07_plugin_enable_and_configure; remove old 03_plugin_routines and 05_system.

• Harden async handling: filter async_status loops by ansible_job_id; conditionally wait only when nextcloud_wait_for_async_enabled; reduce delay to 1s.

• Reorder main.yml to run system steps before plugin setup; keep handlers flush earlier.

• env.j2: simplify get_app_conf lookups (drop extra True flag).

• vars/main.yml: add nextcloud_host_nginx_path and nextcloud_wait_for_async_enabled.

https://chatgpt.com/share/689c9d4a-1748-800f-b490-06a5a48dd831

roles/web-app-nextcloud/tasks/02_add_missing_indices.yml

@@ -0,0 +1,19 @@
+- name: "Launch async: add missing DB indices in Nextcloud"
+  ansible.builtin.command: >
+    {{ nextcloud_docker_exec_occ }} db:add-missing-indices
+  async: 3600
+  poll: 0
+  register: db_indices_job
+
+- name: "Wait for DB indices job"
+  ansible.builtin.async_status:
+    jid: "{{ db_indices_job.ansible_job_id }}"
+  register: db_indices_result
+  until: db_indices_result.finished
+  retries: 600
+  delay: 1
+  failed_when: db_indices_result.rc != 0
+  changed_when: >
+    ('Adding additional' in (db_indices_result.stdout | default(''))) or
+    ('Removing' in (db_indices_result.stdout | default(''))) or
+    ('updated successfully' in (db_indices_result.stdout | default('')))