We want to put the cdoc status in the description of the PR as that is the
most visible area of the UI. If that doesnt work due to race conditions we will
use this status in last comment approach.
tldr: the status would be part of a comment that cdoc has created. If the
comment is not the last comment, it will be deleted and a new comment would be
created.
We are deleting comments to not have comment noice in pull request.
It is assumed that a comment by cdoc would never be edited by anyone other
than cdoc so race conditions go away.