Ensure cron role uses include_tasks and installs cron

[93jun]

This updates the create-cronjob role so it works in a clean recent Ansible environment.

The role had two separate compatibility issues:

• tasks/main.yml used the removed bare include action.
• The role used the Ansible cron module without first ensuring the cron/crontab tooling was installed.

This PR now handles both:

- ansible.builtin.include_tasks: configure.yml

and:

- name: Ensure cron is installed
  ansible.builtin.apt:
    name: cron
    state: present

Validation:

• Checked the diff with git diff --check.
• Re-ran the role path in a clean Ubuntu 22.04 container with ansible-core 2.16.
• The updated role completed successfully:

ok=4 changed=2 failed=0

[mehdi-ra]

No breaking changes.
LGTM