Update ISO installer tiers and backend deployment

ansible/roles/monitoring/tasks/main.yml

@@ -25,6 +25,7 @@
   register: dcgm_result
   failed_when: dcgm_result.rc != 0 and 'already in use' not in dcgm_result.stderr
   ignore_errors: true
+  when: gpu_available | default(false) | bool
 
 # ── Prometheus ──────────────────────────────────────────
 - name: Write Prometheus config
@@ -99,7 +100,8 @@
   wait_for:
     host: localhost
     port: 3000
-    timeout: 60
+    timeout: 120
+  register: grafana_wait
   ignore_errors: true
 
 - name: Add Prometheus datasource to Grafana
@@ -118,6 +120,7 @@
       isDefault: true
     status_code: [200, 409]  # 409 = already exists, that's fine
   ignore_errors: true
+  when: not (grafana_wait is failed)
 
 - name: Import NVIDIA GPU dashboard (ID 12239)
   uri:
@@ -143,3 +146,6 @@
         uid: "nvidia-gpu"
     status_code: [200, 412]
   ignore_errors: true
+  when:
+    - not (grafana_wait is failed)
+    - gpu_available | default(false) | bool