🎁 delete child works if the parent work is deleted

[ShanaLMoore]

Story

TODO: This solution is too aggressive. This solution deletes anything in parent.ordered_works when the parent gets deleted, when really we want to delete any child works derived from the deleted PDF of a parent work.

In IiifPrint,
When a file set (PDF) gets deleted we will need to find the child works (pages) and any pending relationships related to it.

we should have a relationships or pending relationships (maybe sometimes both). delete the related
see #destroy_potential_children. Don't target all the PDFs. Only pending relationships for specific pdf.

See reload_single_pdf_job.rb (but this is too aggressive also and would only work for adventist).

Refs:

• #issuenumber

Expected Behavior Before Changes

Expected Behavior After Changes

Screenshots / Video

Notes

[laritakr]

The goal of this work was to delete the child works when a fileset is removed, not when the parent work is removed.

I believe we already delete the child work when the parent is deleted, but this may not be the case. We should probably verify this.

[laritakr]

Needed work is included in notch8/iiif_print#288