refs https://github.com/TryGhost/Team/issues/1131
- Includes `status` on OfferDTO so client can use it
- Allows editing `status` of Offers
- Allows setting initial `status` when creating Offers
no-issue
This simplifies the handling of updating redirects for a code, and
doesn't affect our application layer because we never have the need to
change a code twice.
In future this should be replaced with events at the domain level - so
that we do not have to track changed properties and instead a redirect
service can listen to events, which would be dispatched on a successful
save by the repository.
