fix: loop_var under loop_control in drain.yml and restore.yml

roles/proxmox_upgrade/tasks/proxmox_upgrade.yml

@@ -0,0 +1,42 @@
+---
+# =============================================================================
+# proxmox_upgrade.yml
+# =============================================================================
+# Rolling Proxmox cluster upgrade playbook.
+# Runs on the first node in upgrade_order — all other nodes are handled
+# via API calls and delegate_to from within the role.
+#
+# Usage:
+#   ansible-playbook playbooks/proxmox_upgrade.yml \
+#     -i inventories/client_local_eng/hypervisor_hosts.yml
+#
+# Override migration behaviour:
+#   -e migration_bulk=true
+#   -e live_migrate_fallback=skip
+#   -e migration_restore=true
+#
+# Dry run (check mode — no changes):
+#   --check
+# =============================================================================
+
+- name: Proxmox Rolling Upgrade
+  hosts: proxmox_cluster
+  gather_facts: true
+  serial: 1
+  run_once: true
+
+  pre_tasks:
+    - name: Confirm upgrade_order is defined
+      ansible.builtin.fail:
+        msg: "upgrade_order must be defined in hypervisor_hosts.yml"
+      when: upgrade_order is not defined or upgrade_order | length == 0
+
+    - name: Log upgrade targets
+      ansible.builtin.debug:
+        msg: >-
+          Proxmox upgrade starting for {{ client_name }} ({{ client_id }})
+          Nodes: {{ upgrade_order | join(', ') }}
+          API: https://{{ api_host }}:{{ api_port }}
+
+  roles:
+    - proxmox_upgrade