This bug is a member of a class of bugs with a common goal: let a debian developer present meta information about a given package to the users of that package. In this case, an image. I think that the most appropriate and most general solution is to provide links to README.Debian from the package page (like http://packages.debian.org/stable/base/bash) and maybe also from the .qa. package page. The whole problem is a specific case of a more general bug on www.d.o: "Allow downloads of a specific file".
Justin