Mark new regular and chunked uploads as pending and claim persisted article references, including partial saves and large reference sets. Protect associated media from cleanup and add upload lifecycle regression coverage.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Mark front-end uploads (comment/ticket/report) as pending, return the
attachment id, discard own pending uploads on remove via
DELETE /upload/pending/{id}, claim referenced URLs on successful submit,
and purge unclaimed uploads older than 24h with an hourly cron.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>