It’s my server and I can treat it how I like 
Nah, it’s super easy to re-add data via another update run
Oh, ok - just some OSM edits needed to clean the bad ones out
It was likely either Unmaintained Track Roads or Should "highway=track" records exist in CityStrides? or me spotting actual high school / college tracks in CityStrides tagged this way & filtering them out.
I’m fine with re-adding the track tag. I’m pretty sure I filtered those out after seeing proper tracks in CityStrides. I was flying blind with OSM tags for a while.