Phase 2 of migrating repo namespaces to referencing user objects, backfilling the rows without a value for namespace_user, and changing all accesses to go through the namespace_user object. All tests are passing, manual testing still required.

endpoints/api/repoemail.py

@@ -20,7 +20,7 @@ def record_view(record):
   return {
     'email': record.email,
     'repository': record.repository.name,
-    'namespace': record.repository.namespace,
+    'namespace': record.repository.namespace_user.username,
     'confirmed': record.confirmed
   }