refactor: restructure inventory, split roles and add new services

roles/authorized_key/tasks/main.yml

@@ -0,0 +1,15 @@
+---
+- name: ensure .ssh exists
+  ansible.builtin.file:
+    path: /root/.ssh
+    state: directory
+    mode: '0700'
+    owner: root
+    group: root
+
+- name: set authorized key
+  ansible.posix.authorized_key:
+    user: root
+    state: present
+    key: "{{ item }}"
+  loop: "{{ ssh_keys }}"