style: Apply Molecule linting fixes

- Fix YAML formatting in defaults and handlers
- Update meta information formatting
- Improve task syntax consistency

defaults/main.yml

@@ -28,4 +28,10 @@ bind9_default_config:
     options:
       directory: "{{ bind9_working_directory }}"
 
-bind9_config: "{{ [bind9_default_config, bind9_group_config, bind9_leaf_config, bind9_host_config] | community.general.lists_mergeby('name', recursive=true, list_merge='append_rp') }}"
+bind9_config: "{{ [bind9_default_config,
+  bind9_group_config,
+  bind9_leaf_config,
+  bind9_host_config] |
+  community.general.lists_mergeby('name',
+    recursive=true,
+    list_merge='append_rp') }}"