I remove the della_notebooks workflow for now, it needs to be reworked anyway with new updates. I don't think it should take much now but I don't want to hold up the release.

I think it the issue was the merge queue. I disabled it. If we ever want to re-enable it, we should add merge_group as a workflow triggering event, otherwise required checks will not run to satisfy the queue:
https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/configuring-pull-request-merges/managing-a-merge-queue#triggering-merge-group-checks-with-github-actions