Add "Last Edited By" column in Data Table, API, Exports

[ukanga]

Suggested Feature / Enhancement

Add a "Last Edited By" column in Table View, API, Exports.

Benefits of implementing the feature/enhancement

• Know who last made an edit

Suggested implementation plan(Steps to be taken to implement feature)

[FrankApiyo]

The edited_by is usually kept in the InstanceHistory.

We can do a shortcut where we place the user who last edited a submission in the submission JSON and then render in the data endpoint.