Fix two cases where we load Commit handles without a viewer

I missed these in testing D5139 because they aren't in the web UIs and I am dumb and can not brain today.

Auditors: vrana

src/applications/maniphest/editor/ManiphestTransactionEditor.php

@@ -226,6 +226,7 @@ final class ManiphestTransactionEditor extends PhabricatorEditor {
     $phids = array_keys($phids);
 
     $handles = id(new PhabricatorObjectHandleData($phids))
+      ->setViewer($this->getActor())
       ->loadHandles();
 
     $view = new ManiphestTransactionDetailView();

src/applications/repository/worker/PhabricatorRepositoryCommitHeraldWorker.php

@@ -77,7 +77,13 @@ final class PhabricatorRepositoryCommitHeraldWorker
         $commit->getPHID(),
       ));
 
-    $handles = id(new PhabricatorObjectHandleData($phids))->loadHandles();
+    // TODO: This is complicated and needs to be sorted out properly for
+    // repository policy stuff. We might need an omniscient user here?
+    $viewer = new PhabricatorUser();
+
+    $handles = id(new PhabricatorObjectHandleData($phids))
+      ->setViewer($viewer)
+      ->loadHandles();
 
     $commit_handle = $handles[$commit->getPHID()];
     $commit_name = $commit_handle->getName();