Document the expected initialization workflow for a Pacemaker/Corosync high-availability cluster with…

Document the expected initialization workflow for a Pacemaker/Corosync high-availability cluster with…: a task in rts-1k-rootless-apptainer: RTS-1K: offline rootless Apptainer release (Harbor dataset). What the agent is asked, how it is graded, what it runs in, and its files.