Overview

This finishes up the work in writefreely#1253 and ensures we always have a handle to display in the fediverse:creator tag.

Background

From the issue:

Work in progress, because ideally we'd always show the fediverse:creator tag. Right now, this will work if someone inputs their handle (e.g. @matt@writing.exchange) in the Verification field, because when saved, we fetch the remote user. We could solve this by always fetching the remote user when updating the Verification value.