fix: resolve Jinja2 .keys ambiguity, fastfetch availability, and python interpreter

roles/configuration/tasks/users.yml

@@ -26,7 +26,7 @@
   changed_when: configuration_user_result.rc == 0
 
 - name: Ensure .ssh directory exists
-  when: item.keys | default([]) | length > 0
+  when: item['keys'] | default([]) | length > 0
   ansible.builtin.file:
     path: "/mnt/home/{{ item.name }}/.ssh"
     state: directory