Checkmk Werk 15885: activate_changes: implement list pending changes endpoint

ID: 15885 Title: activate_changes: implement list pending changes endpoint Component: REST API Level: 1 Class: New feature Version: 2.3.0b1 This werk introduces a new endpoint in the activation_run domain for showing a list of pending changes. This is useful if you want to know if there are changes pending and what they are before activating them. The new endpoint is as follows .../domain-types/activation_run/collections/pending_changes