In a number of places in our codebase, we just fire up goroutines and never account for them being done with a WaitGroup, etc.

This means some stay running after a test or shutdown, sometimes causing mysteries or data races.

I'd like to have a goroutine tracker type that goroutine-creating components to use that they launch goroutines via, and have it provide accounting of what's outstanding for tests and graceful shutdown.

I've written a few variants of this over time but after doing it yet again, I think it's time to pull it out into a type and reuse it in more places.

/cc @sailorfrag