In the past, there have been worries about securing payments for the S3 storage backing the cache at cache.nixos.org.
I also remember that there have been discussions about deleting artifacts within the cache and doing regular cleaning rounds.
Can someone please link me to a document of the current state of affairs? Have we ever deleted anything (there was an announcement but I can not find it)? Do we regularly repeat this GC? Are the requirements against such a GC documented anywhere?
By documentation I do not mean posts in threads here, or comments in GH issues, but some maintenance handbook, or things like that.