Allow duplicates and merged-in tasks to be queried with `edge.search`

Summary: See PHI147.

Test Plan: Called the method from the web UI, got sensible results.

Reviewers: amckinley

Reviewed By: amckinley

Differential Revision: https://secure.phabricator.com/D18706

src/applications/maniphest/edge/ManiphestTaskHasDuplicateTaskEdgeType.php

···
     return true;
   }
 
+  public function getConduitKey() {
+    return 'task.merged-in';
+  }
+
+  public function getConduitName() {
+    return pht('Merged In');
+  }
+
+  public function getConduitDescription() {
+    return pht(
+      'The source task has had the destination task closed as a '.
+      'duplicate and merged into it.');
+  }
+
 }

src/applications/maniphest/edge/ManiphestTaskIsDuplicateOfTaskEdgeType.php

···
     return true;
   }
 
+  public function getConduitKey() {
+    return 'task.duplicate';
+  }
+
+  public function getConduitName() {
+    return pht('Closed as Duplicate');
+  }
+
+  public function getConduitDescription() {
+    return pht(
+      'The source task has been closed as a duplicate of the '.
+      'destination task.');
+  }
+
+
 }