Note:
This is currently a stub ticket and a placeholder for a first production deployment. Also to link dependencies we want to get done before we consider this step.

Prerequisites:
See subtickets

Other:

• Admins of the affected wikis need to be notified so that can be made aware of the tracking category introduced with the feature. See T239989: Use category rather than page prop to mark Book Referencing pages. They might want to add the __HIDDENCAT__ magic word there to hide the category.

Implementation:
Planned for sprint starting: TBD

• Deploy feature to
  • group0 wikis
  • dewiki (the request for this feature came from the German community)

Don't activate on any other wikis.