- endpoint semantics: non-admin cancel is 403, unknown job is 404
- mid-scan safety: start a scan of 1200 unparseable .epub files and
cancel it, then pin the invariant that no media item is marked
missing or archived. The canary item's file is lexically LAST in
the folder, so an abort that (incorrectly) ran the archive pass
would treat it as unvisited and trip the assertion. Assertions
hold under every interleaving - whether the cancel lands mid-walk
or the scan already finished - so the test cannot flap against
timing.
- re-cancelling a terminal job is a 409
The test library is created through the shared
createTestLibraryWithFolder helper, which registers API-delete
cleanup so runs leave no residue in the dev database.
Worker-level unit tests live in internal/services/worker_cancel_test.go
(previous commit).
