Include starred and read status in entries JSON

[DRMacIver]

It would be very helpful if the starred and read status of an entry could appear in its JSON output - not having it there means there's no way to directly access this information except to query for all unread and starred entries and match IDs.

[such]

👍

[brendanlong]

👍 to this. It's not clear to me what's missing to implement this, since Entry has read and starred, but they don't show up in the JSON output.