As an Owner, I should be able to see the searches that have happened in my Space

Summary: The Use Case here is the Spirit Island FAQ, to see what people are looking for, but it's probably interesting for anybody running a public site.

This is specifically not going to happen until we switch to Akka Persistence on Cassandra. Once we get there, this becomes easier: we have a Persistent Actor per Space, which records searches in some sort of reasonably efficient data structure. That'll grow indefinitely, but seems likely to be reasonable. (Do think this through, though, and make sure it makes sense.) It might also make sense to use completely pure Akka Persistence, with empty snapshots, and do queries into it with the new Persistence Queries mechanism -- that would let us do time-oriented queries without needing to store computed snapshots.

Does this always happen, for every Space, or is it a feature you turn on? I'm not too worried about disk space, but this may be one you turn on explicitly, since it'll certainly add up. It also might be a paid-user feature: that's not entirely obvious, but it's certainly advanced stuff, and it does consume extra system resources, so that's not unreasonable.