[STYLE-747] Event guidelines

Oooh, I re-read the text, and I just realized this is all about linking recordings to events and event series (so basically, “if you’re linking a recording just to a festival series because that’s all you know, you don’t need to duplicate the place on the recording because the festival series covers it”. That I think is less problematic so I think I won’t touch it, except it’s not super clear so maybe it should be edited for clarity later :slight_smile: But let’s not worry about it yet I guess.