Refactor path handling, service conditions and dependencies

- Fixed incorrect filter usage in docker-compose handler (proper use of | path_join).
- Improved LetsEncrypt template by joining paths with filenames instead of appending manually.
- Enhanced sys-svc-msmtp task with an additional condition to only run if no-reply mailu_token exists.
- Updated Keycloak meta to depend on Mailu (ensuring token generation before setup).
- Refactored Keycloak import path variables to use path_join consistently.
- Adjusted Mailu meta dependency to run after Matomo instead of Keycloak.

See: https://chatgpt.com/share/68af13e6-edc0-800f-b76a-a5f427837173

roles/sys-svc-msmtp/tasks/main.yml

@@ -2,4 +2,6 @@
   - include_tasks: 01_core.yml
   - set_fact:
       run_once_sys_svc_msmtp: true
-  when: run_once_sys_svc_msmtp is not defined
+  when:
+    - run_once_sys_svc_msmtp is not defined
+    - (users['no-reply'].mailu_token | default(false)) | bool # Don't setup the service if no-reply mailu token doesn't exist