In the EventBus PageChangeHooks implementation PageUndeleteCompleteHook is also triggered when restoring into an existing page. This behavior is similar to an import, effectively resembling a merge.

In the context of the mediawiki.page_change.v1 stream, this does not update the latest revision and could be misleading.

@dkinzler proposes modeling undeletes using domain events. We may eventually distinguish between "proper" undeletes (i.e., the page is recreated) and "undelete into existing" events. As we replace the use of PageUndeleteCompleteHook for the stream, we can revise the emission behavior accordingly.

Acceptance Criteria (AC)

• "undelete into an existing page" events are not published mediawiki.page_change.v1