Fix an issue where Herald rules could fail to evaluate at post-commit time

Summary: Ref T13480. Some Herald fields need audit information, which recent changes to Herald adapters discarded. For now, just load it unconditionally.

Test Plan: Triggered an Audit-related rule locally.

Maniphest Tasks: T13480

Differential Revision: https://secure.phabricator.com/D20962

src/applications/diffusion/herald/HeraldCommitAdapter.php

@@ -52,6 +52,7 @@ final class HeraldCommitAdapter
       ->withPHIDs(array($commit_phid))
       ->needCommitData(true)
       ->needIdentities(true)
+      ->needAuditRequests(true)
       ->executeOne();
     if (!$commit) {
       throw new Exception(