File Tag for "Performance Date"

@brian, @mike, as far as I can see there is no official or supported “Performance Date” FLAC tag. Please correct me if I’m wrong.

Could we have a custom tag for that please, so that for performances on unrecognized albums, the performance date can be used in Roon (in the Album Detail page, and also - crucially - in the Work Details Page).

Many thanks! :smile:

Same goes for Performance Venue.