matrix-sygnal: switch to modern community.docker docker_image modules

Replaces `community.docker.docker_image` with the modern
`docker_image_pull` module. Drops the `ansible_version` compatibility
ladder and the now-redundant `_container_image_force_pull` variable
(the new pull module handles registry refresh natively via `pull: always`).

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/5191.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

roles/custom/matrix-sygnal/defaults/main.yml

@@ -39,7 +39,6 @@ matrix_sygnal_container_image_tag: "{{ matrix_sygnal_version }}"
 matrix_sygnal_container_image_registry_prefix: "{{ matrix_sygnal_container_image_registry_prefix_upstream }}"
 matrix_sygnal_container_image_registry_prefix_upstream: "{{ matrix_sygnal_container_image_registry_prefix_upstream_default }}"
 matrix_sygnal_container_image_registry_prefix_upstream_default: "docker.io/"
-matrix_sygnal_container_image_force_pull: "{{ matrix_sygnal_container_image.endswith(':latest') }}"
 
 # The base container network. It will be auto-created by this role if it doesn't exist already.
 matrix_sygnal_container_network: "{{ matrix_sygnal_identifier }}"

roles/custom/matrix-sygnal/tasks/install.yml

@@ -40,11 +40,9 @@
   register: matrix_sygnal_support_files_result
 
 - name: Ensure Sygnal image is pulled
-  community.docker.docker_image:
+  community.docker.docker_image_pull:
     name: "{{ matrix_sygnal_container_image }}"
-    source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
-    force_source: "{{ matrix_sygnal_container_image_force_pull if ansible_version.major > 2 or ansible_version.minor >= 8 else omit }}"
-    force: "{{ omit if ansible_version.major > 2 or ansible_version.minor >= 8 else matrix_sygnal_container_image_force_pull }}"
+    pull: always
   register: matrix_sygnal_container_image_pull_result
   retries: "{{ devture_playbook_help_container_retries_count }}"
   delay: "{{ devture_playbook_help_container_retries_delay }}"

roles/custom/matrix-sygnal/tasks/validate_config.yml

@@ -18,6 +18,7 @@
     - {'old': 'matrix_sygnal_docker_image_registry_prefix_upstream', 'new': 'matrix_sygnal_container_image_registry_prefix_upstream'}
     - {'old': 'matrix_sygnal_docker_image_registry_prefix_upstream_default', 'new': 'matrix_sygnal_container_image_registry_prefix_upstream_default'}
     - {'old': 'matrix_sygnal_docker_image_tag', 'new': 'matrix_sygnal_container_image_tag'}
+    - {'old': 'matrix_sygnal_container_image_force_pull', 'new': '<removed> (the new community.docker.docker_image_pull module handles this natively)'}
 
 
 - name: Fail if required Sygnal settings not defined