feat: add task to ensure passlib is installed on the ansible controller

tasks/preflight-checks.yml

@@ -15,6 +15,15 @@
   run_once: true
   become: false
 
+- name: "[PREFLIGHT] Ensure passlib is installed"
+  ansible.builtin.pip:
+    name: passlib
+    state: present
+    executable: "{{ controller_python | dirname }}/pip"
+  delegate_to: localhost
+  run_once: true
+  become: true
+
 - name: "[PREFLIGHT] Check if running on Proxmox host"
   ansible.builtin.stat:
     path: "/etc/pve/nodes"