Fix Nextcloud Talk Recording volumes and fully enable external DB/Redis integration for ONLYOFFICE.

Includes:
- Talk recording tmp volume wiring for Nextcloud
- ONLYOFFICE external PostgreSQL/Redis env integration
- Added explicit volumes for pgdata/redis/rabbitmq
- Switched ONLYOFFICE role to sys-stk-full-stateful
- Updated docker-compose mounts and vars
- CSP and feature flag improvements

Conversation reference: https://chatgpt.com/share/6922f50e-cc44-800f-89fc-e1251c5bbe45

roles/web-svc-onlyoffice/tasks/01_core.yml

@@ -1,6 +1,6 @@
-- name: "Load core functions for '{{ application_id }}'"
+- name: "load docker, db and proxy for {{ application_id }}"
   include_role:
-    name: sys-stk-full-stateless
+    name: sys-stk-full-stateful
   vars:
     docker_compose_flush_handlers:        true
     docker_compose_file_creation_enabled: true