message: registry-watcher: when setting the last-seen ref, first set the db
diff: @@ -300,15 +300,15 @@ impl BuildQueue {
  }
  }
  - // store the last seen reference as git reference in
  - // the local crates.io index repo.
  - diff.set_last_seen_reference(oid)?;
  -
  // additionally set the reference in the database
  // so this survives recreating the registry watcher
  // server.
  self.set_last_seen_reference(oid)?;
  + // store the last seen reference as git reference in
  + // the local crates.io index repo.
  + diff.set_last_seen_reference(oid)?;
  +
  Ok(crates_added)
  }
  