apt_mirror failure when mirroring trixie, assumption mismatch on package uniqueness

We are faced with a mirroring failure on debusine.debian.net. Debusine is unhappy about ripasso-cursive_0.8.0-1+b2_amd64.deb being available with two distinct hash values. As is evident from the build logs and the snapshot service, both instances of that package actually existed at some point in time. Debusine assumes that for any given combination of package name, version and architecture there only is one actual binary package with a unique hash. The Debian archive provides this property with a twist. It holds true at any given point in time, but a binary package may exist with one hash at one time, get deleted and re-added with a different hash at a later timer. Since Debusine effectively adds snapshot functionality here, it keeps track of those older versions and gets unhappy.