Implement debian:archive collection

https://freexian-team.pages.debian.net/debusine/reference/collections/specs/archive.html specifies the behaviour of a debian:archive collection. Once #328 (closed) has been completed, we can implement this.

I think we can get away without this for STF M2, so for the time being I'm not assigning this to any STF milestone.

Edited May 27, 2025 by Colin Watson

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information