Update BorgBase repo ID after recreating repository

Previous repo had corrupted segments from interrupted backup attempts.
Recreated as u3ugi1x1 (same region, same SSH key, same settings).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ansible/roles/borgmatic/defaults/main.yml

@@ -23,7 +23,7 @@ borgmatic_repositories:
     label: sifaka-borg-backups
     encryption: repokey
     append_only: true
-  - path: ssh://k04ljcd7@k04ljcd7.repo.borgbase.com/./repo
+  - path: ssh://u3ugi1x1@u3ugi1x1.repo.borgbase.com/./repo
     label: borgbase-offsite
     encryption: repokey
     append_only: true

ansible/roles/borgmatic/tasks/main.yml

@@ -29,8 +29,8 @@
 
 - name: Add BorgBase host key to known_hosts
   ansible.builtin.known_hosts:
-    name: k04ljcd7.repo.borgbase.com
-    key: "k04ljcd7.repo.borgbase.com ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGU0mISTyHBw9tBs6SuhSq8tvNM8m9eifQxM+88TowPO"
+    name: u3ugi1x1.repo.borgbase.com
+    key: "u3ugi1x1.repo.borgbase.com ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGU0mISTyHBw9tBs6SuhSq8tvNM8m9eifQxM+88TowPO"
     state: present
 
 - name: Deploy borgmatic configuration