This seems like a fairly obvious oversight with the column.search api.
Knowing
1. the status (active vs archived)
2. isDefaultColumn (the one that tasks get dropped in by default)
3. sequence (order on the workboard)
are all necessary for a lot of things that very sensible real-world api clients need to do when working with columns.
Cherry-picked from https://phabricator.wikimedia.org/rPHABebfe30890b52784d222ec4ed36c05462b2a57f92