Add InitialApplier, LastApplier and LastAppliedAt to Campaign
Created by: mrnugget
This fixes https://github.com/sourcegraph/sourcegraph/issues/12467 by recording these fields and exposing them in the API.
Created by: mrnugget
This fixes https://github.com/sourcegraph/sourcegraph/issues/12467 by recording these fields and exposing them in the API.