lyn
1e7af09245
Gitea's /-/link/{repo} endpoint returns HTTP 400 "invalid argument"
whenever the package already has ANY linked repo, and /-/unlink returns
the same 400 when nothing is linked. Both are non-idempotent. Fix by
GET-ing the package version first, comparing the current repository to
the target, and only unlinking/linking when the state actually needs to
change. Idempotent across repeated publishes of the same image.