feat(vmware): add hypervisor.node as unified placement field (replaces host)

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

roles/global_defaults/tasks/validation.yml

@@ -166,6 +166,23 @@
     label: "hypervisor.{{ item }}"
   no_log: true
 
+- name: Validate VMware placement (cluster or node required, mutually exclusive)
+  when:
+    - system_cfg.type == "virtual"
+    - hypervisor_type == "vmware"
+  ansible.builtin.assert:
+    that:
+      - >-
+        (hypervisor_cfg.cluster | default('') | string | length > 0)
+        or (hypervisor_cfg.node | default('') | string | length > 0)
+      - >-
+        (hypervisor_cfg.cluster | default('') | string | length == 0)
+        or (hypervisor_cfg.node | default('') | string | length == 0)
+    fail_msg: >-
+      VMware requires either hypervisor.cluster or hypervisor.node (mutually exclusive).
+      cluster targets a vSphere cluster; node targets a specific ESXi host.
+    quiet: true
+
 - name: Validate hypervisor-specific required system fields
   when:
     - system_cfg.type == "virtual"