Summary: See PHI177. Ref T12974. PonderQuestion was overlooked during the Ferret engine conversions.
Test Plan:
Ran migrations, searched for questions, got results:
{F5241185}
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T12974
Differential Revision: https://secure.phabricator.com/D18736
