show/activity: show hex checksum

application/views/scripts/show/activitylog.phtml

@@ -47,6 +47,10 @@ $url = $this->url()->without('checksum')->without('show');
     )
     ?></td>
   </tr>
+  <tr>
+    <th><?= $this->translate('Checksum') ?></th>
+    <td><?= bin2hex($this->entry->checksum) ?></td>
+  </tr>
 </table>
 <?php if (! empty($this->output)): ?>
 <h1><?= $this->escape($this->title) ?></h1>