Fix an issue with URI index updates from the daemons

Summary:
Ref T10923. This extension needs to load a little more data (with needURIs) to function correctly now.

(There's a recent migration does this, so indexes got updated correctly when it ran, so it hasn't been obvious that they weren't getting updated properly after that.)

Test Plan: Made an arbitrary edit to a repository, observed no more error in daemon logs.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10923

Differential Revision: https://secure.phabricator.com/D15908