Does anyone have an example / walkthrough on how to use the queryMetrics interface to provide some of the non default metrics? I'm specifically looking at query/segments/count introduced in the new 28.0.0 release. I'm not a java dev so the info contained within https://github.com/apache/druid/blob/druid-28.0.0/processing/src/main/java/org/apache/druid/query/QueryMetrics.java isn't particularly helpful. Hopefully I'm missing something and it's already documented somewhere as expecting everyone that deploys druid to also be a java dev seems ridiculously unhelpful. Please help!!!