R1:327ac921c28b

Conduit column.search: add status, sequence and isDefault to API results

Summary:
This seems like a fairly obvious oversight with the column.search API.

Knowing:

1. isHidden - boolean to indicate Active vs Archived
2. isDefaultColumn - the one that Tasks get dropped in by default, usually called "Backlog"
3. sequence - numerical 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.

Partial cherry-pick from:

https…