com.cultureblocs.place.lineup

Cultural detail attached to an event that the shared calendar record does not carry: who is on, and what is performed or shown. A layer, not a replacement — it references an event by strongRef and never duplicates it. Supersedes com.cultureblocs.venue.lineup, renamed with venue.profile → place.profile so the namespace stays consistent; the shape is unchanged except that `venue` is now `place`. If these fields prove generally useful they belong upstream in the community calendar lexicon, not here.