Inquiry cli: --classes filter option to trackers eval

Hi! I was running `trackers track --classes person` on MOT17 and noticed that `trackers eval` doesn't seem to have a `--classes` option. When tracking with `--classes person`, the prediction file only contains person detections, but the GT file still has all classes — so metrics like MOTA/HOTA end up being skewed. Is there a way to filter by class when running eval that I'm missing? If not, would a `--classes` option be a addition?