Add Register variables for Repositories role

[ikeusmaximus]

We are looking to expand the functionality of our internal role to notify a handler for the content syncing tasks (e.g.):

<role_path>/handlers/main.yml:

- name: Sync repositories
  redhat.satellite.repository_sync:
    username: admin
    password: changeme
    server_url: "https://satellite.example.com
    organization: "Default Organiation"
    product: "{{ product.name }}"
  loop: "{{ satellite_products }}"
  loop_control:
    loop_var: product

The tasks for enabling the repositories, we are leveraging straight out of the documentation for defining the variables:
https://github.com/RedHatSatellite/satellite-ansible-collection/blob/develop/roles/repositories/README.md

Then we simply include/import the role:

- name: Include Red Hat Satellite collection repositories role (to enable repositories/repository sets)
  ansible.builtin.import_role:
    name: redhat.satellite.repositories

We can add/remove repositories via code, and when we add new ones, we would like to notify the handler to do an immediate sync of content.

Based on Ansible documentation:
https://docs.ansible.com/ansible/latest/collections/ansible/builtin/include_role_module.html
https://docs.ansible.com/ansible/latest/collections/ansible/builtin/import_role_module.html

"To apply keywords to the tasks within the role, pass them using the apply option or use ansible.builtin.import_role instead."

Per https://docs.ansible.com/ansible/latest/reference_appendices/playbooks_keywords.html

"register" is a valid ansible keyword, yet when trying various combinations of import/include and:

apply:
  register: <variable_name>

The task outputs are not being captured properly if they don't throw an error ("Register is not a valid attribute for Block"). Debugging only says "VARIABLE NOT DEFINED"

I am fairly certain this is a limitation of ansible because the following code compiles/lints, runs, and the no_log functionality is correctly applied:

apply:
  no_log: true

So to start the actual discussion, thoughts on adding register: <variable_name> to the tasks contained within the redhat.satellite.repositories role?

Additional things to consider:

• Adding custom products always results in a change, maybe add changed_when conditions?
• Add register keywords for sync_plans as well?
• Sync plans always add as changed even when exactly the same, maybe add changed_when conditions?