Update docs

api.html

@@ -6,14 +6,14 @@
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-  <title>API reference &mdash; parsedmarc 10.0.3 documentation</title>
+  <title>API reference &mdash; parsedmarc 10.0.4 documentation</title>
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@@ -806,7 +806,9 @@ failure report samples with None</p></li>
 <li><p><strong>since</strong> – Search for messages since certain time</p></li>
 <li><p><strong>normalize_timespan_threshold_hours</strong> (<em>float</em>) – Normalize timespans beyond this</p></li>
 <li><p><strong>config_reloading</strong> – Optional callable that returns True when a config
-reload has been requested (e.g. via SIGHUP)</p></li>
+reload (or shutdown) has been requested (e.g. via SIGHUP/SIGTERM).
+Polled by the mailbox backend between checks, including the IMAP
+IDLE loop, so the watcher exits cleanly at a safe boundary.</p></li>
 </ul>
 </dd>
 </dl>