Would it be possible to document the full metrics that this exporter exposes? What I mean is simply state the metric, what it measures in a sentence or two, what the unit of measure is (if applicable) and what kind it is: counter, guage, histogram or summary. There is a section in the README that lists "meta-classes" of metrics (for lack of a better word) but it does not go into the details of the metrics contained in each one. Thanks.