Improve `http_server_requests_seconds` metrics with realm label?

A typical entry for this metric looks like this:

http_server_requests_seconds_count{method="DELETE",outcome="SUCCESS",status="204",uri="/admin/realms/{realm}/users/{user-id}"} 1.0

This is already great.

If one has multiple realms on the same server, this metric can become … a bit … confusing. Because one can’t link things to each realm.

Could those routes (like /admin/realms/{realm}/users/{user-id}) please also have a label like realm="customer" attached to them?

For those routes that do not have a {realm}, I don’t know, whether it would be better to attach a realm="" label or no label at all. My first idea would be to attach no label at all, because there is NO realm. It’s not an empty realm.