Vmitnick/crema headlights

This logs an additional headlights event when assets are generated for a PSD where the user used Crema to set up generator, or for a PSD where the user didn't use generator, so we can compare the two.

To avoid having an even for every asset generated, I'm currently limiting it to a single one of each of these events per PS session, but might change that.
Yeah, I should have anticipated that question.
They do correspond exactly here, but the one without "auto" is *also" logged inside the Crema code when we do an explicit extraction. Having both of these here lets us most easily get the totals for crema vs non-crema, both "manual" and "automatic", and also compare manual vs automatic for crema.
This just allows us to get some more direct data from headlights without having to add or subtract different event counts.