Update ISO installer tiers and backend deployment

ansible/entry.yml

@@ -1,7 +1,7 @@
 ---
-# Phase 2: Full Cezen AI Suite — Entry Tier
+# Phase 2: Full Nexus One AI — Entry Tier
 # Runs after NVIDIA driver reboot
-- name: Cezen AI — Entry Tier Stack
+- name: Nexus One AI — Entry Tier Stack
   hosts: localhost
   connection: local
   become: true
@@ -35,3 +35,9 @@
       when: "'minio' not in skip_roles.split(',')"
     - role: monitoring
       when: "'monitoring' not in skip_roles.split(',')"
+    - role: cezen-backend
+      when: "'cezen-backend' not in skip_roles.split(',')"
+    - role: cezen-ttyd
+      when: "'cezen-ttyd' not in skip_roles.split(',')"
+    - role: cezen-nginx
+      when: "'cezen-nginx' not in skip_roles.split(',')"