Refactor Ansible tasks to use fully qualified module names and improve code consistency

- Updated all tasks to use fully qualified module names (e.g., ansible.builtin.shell, ansible.builtin.copy) for clarity and to avoid ambiguity.
- Replaced deprecated 'yum' module with 'dnf' for package management on RedHat-based systems.
- Improved formatting and consistency in task definitions, including the use of double quotes for strings and consistent indentation.
- Removed unnecessary comments and whitespace to enhance readability.
- Ensured that conditions and loops are consistently formatted across all tasks.

roles/common/tasks/mysql.yml

@@ -1,5 +1,4 @@
 ---
-
 # ---
 # MySQL / MariaDB  Server
 # ---
@@ -7,31 +6,28 @@
 - name: Populate service facts
   ansible.builtin.service_facts:
 
-#- name: Print service facts
+# - name: Print service facts
 #  ansible.builtin.debug:
 #    var: ansible_facts.services
 #  when: 
 #    - ansible_facts['services']['mariadb.service']['name'] | default('not-found') != 'not-found'
-
-
 - name: (mysql.yml) Ensure directory '/etc/systemd/system/mariadb.service.d' is present
-  file:
+  ansible.builtin.file:
     path: /etc/systemd/system/mariadb.service.d
     state: directory
     owner: root
     group: root
-    mode: '0755'
+    mode: "0755"
   when:
     - ansible_facts['services']['mariadb.service']['name'] | default('not-found') != 'not-found'
 
-
 - name: (mysql.yml) Ensure file '/etc/systemd/system/mariadb.service.d/limits.conf' exists
-  copy:
-    src: 'etc/systemd/system/mariadb.service.d/limits.conf'
-    dest: '/etc/systemd/system/mariadb.service.d/limits.conf'
+  ansible.builtin.copy:
+    src: "etc/systemd/system/mariadb.service.d/limits.conf"
+    dest: "/etc/systemd/system/mariadb.service.d/limits.conf"
     owner: root
     group: root
-    mode: '0644'
+    mode: "0644"
   notify: "Restart mariadb"
   when:
     - ansible_facts['services']['mariadb.service']['name'] | default('not-found') != 'not-found'