Do not delete CloudKit zone. Instead, delete Core Data entities and let
sync do the rest. It's also a "more standard" approach.
Deleting the zone right after the entities legitimately makes deletion
ineffective, because it probably spoils sync.
Additions to the domain:
- Update rather than replace existing Core Data profile
- Attach ProfileAttributes to Profile.userInfo
- Store one-off `fingerprint` UUID on each save
With the above in place, fix and improve ProfileManager to:
- Use `fingerprint` to compare local/remote profiles in history and thus
avoid local re-import of shared profiles
- Use `deletingRemotely` to delete local profiles when removed from the
remote repository (default false)
- Use `isIncluded` filter to exclude certain profiles from the local
repository (default nil)
Davide