fix: enable and start systemd-timesyncd in common time role

systemd-timesyncd was installed via common_packages but never enabled or
started, causing NodeClockNotSynchronising alerts across all k3s nodes.

roles/common/tasks/time.yaml

@@ -9,3 +9,18 @@
   community.general.timezone:
     name: "{{ timezone }}"
   when: ansible_user_id == "root"
+
+- name: Enable and start systemd-timesyncd
+  ansible.builtin.systemd:
+    name: systemd-timesyncd
+    enabled: true
+    state: started
+  become: true
+  when: ansible_user_id != "root"
+
+- name: Enable and start systemd-timesyncd
+  ansible.builtin.systemd:
+    name: systemd-timesyncd
+    enabled: true
+    state: started
+  when: ansible_user_id == "root"