Exactly! In the best place you have to handle it. A nice API can make sense about the operation on the data and help it evolve.
These discussions always creates in my mind a picture of someone saying that we should be refilling all the forms that you have in a cabinet full of hand filled forms because someone decided that a new version of the form requires a new field like an e-mail address.
Moving it to your application doesn't solve this problem, it just pushes it out of the DB.