Add update_ansible_host.yml playbook

Dedicated playbook for updating the Ansible control node separately
from the bulk update_upgrade.yml which excludes AnsibleHost.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

playbooks/update_ansible_host.yml

@@ -0,0 +1,23 @@
+---
+- name: Update and upgrade Ansible host
+  hosts: AnsibleHost
+  become: true
+  gather_facts: true
+
+  tasks:
+    - name: Update and upgrade apt packages
+      apt:
+        update_cache: yes
+        upgrade: safe
+      when: ansible_os_family == "Debian"
+
+    - name: Check if reboot is required
+      ansible.builtin.stat:
+        path: /var/run/reboot-required
+        get_checksum: no
+      register: reboot_required_file
+      when: ansible_os_family == "Debian"
+
+    - name: Reboot if required
+      ansible.builtin.reboot:
+      when: reboot_required_file is defined and reboot_required_file.stat.exists