refactor(hypervisor): consolidate host to node as unified placement field

roles/global_defaults/defaults/main.yml

@@ -46,7 +46,6 @@ hypervisor_defaults:
   url: ""
   username: ""
   password: ""
-  host: ""
   node: ""
   storage: ""
   datacenter: ""
@@ -137,7 +136,7 @@ system_defaults:
 # All virtual types additionally require network bridge or interfaces.
 hypervisor_required_fields:
   proxmox:
-    hypervisor: [url, username, password, host, storage]
+    hypervisor: [url, username, password, node, storage]
     system: [id]
   vmware:
     hypervisor: [url, username, password, datacenter, storage]

roles/global_defaults/tasks/main.yml

@@ -32,7 +32,7 @@
       api_host: "{{ hypervisor_cfg.url }}"
       api_user: "{{ hypervisor_cfg.username }}"
       api_password: "{{ hypervisor_cfg.password }}"
-      node: "{{ hypervisor_cfg.host }}"
+      node: "{{ hypervisor_cfg.node }}"
   no_log: true
 
 - name: Normalize system inputs