The web view of an externaldebsign task doesn't make it clear what it's signing

The web view of an externaldebsign task doesn't show you what package needs to be sign. It should probably describe the type (source/binary) name, version, and target suite. Or even just the filename of the upload.

The information is in the breadcrumbs, and in the name of the parent workflow, but that isn't particularly obvious. If we're sigining something, it should be very clear what we're signing.

e.g. https://debusine.debian.net/debian/developers/work-request/221849/