Backup server: use backup_server_clients for keys and ssh config

Borg passphrase files are named by app; looping over all backup_clients let public-cloud-frontend overwrite the key of the live 'webserver' repo.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tasks/server.yml

@@ -26,21 +26,21 @@
 
 - name: setup ssh public keys of clients
   copy:
-    content: "{{ backup_clients[item].sshpubkey }}"
+    content: "{{ backup_server_clients[item].sshpubkey }}"
     dest: "{{ backup_home }}/.ssh/{{ item }}.pub"
     owner: "{{ backup_owner }}"
     group: "{{ backup_group }}"
     mode: "0600"
-  loop: "{{ backup_clients.keys() }}"
+  loop: "{{ backup_server_clients.keys() }}"
 
 - name: setup ssh private keys of clients
   copy:
-    content: "{{ backup_clients[item].sshprivkey }}"
+    content: "{{ backup_server_clients[item].sshprivkey }}"
     dest: "{{ backup_home }}/.ssh/{{ item }}"
     owner: "{{ backup_owner }}"
     group: "{{ backup_group }}"
     mode: "0600"
-  loop: "{{ backup_clients.keys() }}"
+  loop: "{{ backup_server_clients.keys() }}"
 
 - name: setup ssh config of clients
   template:
@@ -60,12 +60,12 @@
 
 - name: setup borg repository keys
   copy:
-    content: "{{ backup_clients[item].borgkey }}"
-    dest: "{{ backup_key_folder }}/{{ backup_clients[item].app }}"
+    content: "{{ backup_server_clients[item].borgkey }}"
+    dest: "{{ backup_key_folder }}/{{ backup_server_clients[item].app }}"
     owner: "{{ backup_owner }}"
     group: "{{ backup_group }}"
     mode: "0600"
-  loop: "{{ backup_clients.keys() }}"
+  loop: "{{ backup_server_clients.keys() }}"
 
 - name: setup local backup storage folder
   file: