[Deprecation] Task "Load distro-specific vars" uses legacy fact injection

[slymit]

Description

When running this role on recent Ansible versions, a deprecation warning is triggered regarding INJECT_FACTS_AS_VARS. Starting with ansible-core 2.24, top-level facts (like ansible_os_family) will no longer be auto-injected as global variables.

Current Behavior

The role accesses the OS family fact directly:

- name: Load distro-specific vars
  include_vars: "{{ ansible_os_family }}.yml"
  tags: always

This produces the following warning:

TASK [ansible-docker-systemd-service : Load distro-specific vars] **************
[DEPRECATION WARNING]: INJECT_FACTS_AS_VARS default to `True` is deprecated, top-level facts will not be auto injected after the change. This feature will be removed from ansible-core version 2.24.
Origin: /home/slymit/.ansible/roles/ansible-docker-systemd-service/tasks/main.yml:3:17

1 ---
2 - name: Load distro-specific vars
3   include_vars: "{{ ansible_os_family }}.yml"
                  ^ column 17

Use `ansible_facts["fact_name"]` (no `ansible_` prefix) instead.

Environment

ansible [core 2.20.2]
  config file = None
  configured module search path = ['/home/slymit/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/slymit/Projects/my-app/.venv/lib/python3.13/site-packages/ansible
  ansible collection location = /home/slymit/.ansible/collections:/usr/share/ansible/collections
  executable location = /home/slymit/Projects/my-app/.venv/bin/ansible
  python version = 3.13.3 (main, Jun  2 2025, 20:42:21) [GCC 15.1.1 20250425] (/home/slymit/Projects/my-app/.venv/bin/python3)
  jinja version = 3.1.6
  pyyaml version = 6.0.3 (with libyaml v0.2.5)

Expected Behavior

The role should use the ansible_facts dictionary to ensure compatibility with future Ansible versions (2.24+).

P. S.: Thanks for this role!