Add encoding information to "repository.query"

Summary: Ref T7604. Add `encoding` information to the `repository.query` #conduit query.

Test Plan: Changed repository encoding from the UI and saw the encoding returned by the Conduit call.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T7604

Differential Revision: https://secure.phabricator.com/D12992

src/applications/repository/storage/PhabricatorRepository.php

@@ -135,6 +135,7 @@ final class PhabricatorRepository extends PhabricatorRepositoryDAO
       'isActive'    => $this->isTracked(),
       'isHosted'    => $this->isHosted(),
       'isImporting' => $this->isImporting(),
+      'encoding'    => $this->getDetail('encoding'),
     );
   }