Explictly set Synapse's worker configuration's owner/permissions

roles/matrix-synapse/tasks/synapse/workers/util/setup_files_for_worker.yml

@@ -13,6 +13,9 @@
   ansible.builtin.template:
     src: "{{ role_path }}/templates/synapse/worker.yaml.j2"
     dest: "{{ matrix_synapse_config_dir_path }}/{{ matrix_synapse_worker_config_file_name }}"
+    mode: 0644
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
 
 - name: Ensure systemd service exists for {{ matrix_synapse_worker_systemd_service_name }}
   ansible.builtin.template: