inventory, roles, config, docs: update all files to refactor the ansible variables structure

ansible/roles/app/tasks/services/set_vikunja.yaml

@@ -20,7 +20,7 @@
   ansible.builtin.copy:
     content: |
       {{ hostvars['console']['ca']['root']['crt'] }}
-    dest: "{{ node['home_path'] }}/containers/vikunja/ssl/ilnmors_root_ca.crt"
+    dest: "{{ node['home_path'] }}/containers/vikunja/ssl/{{ root_cert_filename }}"
     owner: "{{ vikunja_subuid }}"
     group: "svadmins"
     mode: "0440"