Handle PATCH / gracefully

[Codex]

PATCH requests to / crashed due to an undefined handler function. The route now returns a plain success message.

• Patch endpoint: Replaced the undefined call in patchHandler.js with a simple "Patch received" response to keep the server stable.
• Logging: Existing request logging remains intact.

Example:

router.patch("/", (req, res) => {
  console.log(`${new Date()} ${req.method} ${req.path}`);
  res.send("Patch received");
});

Original prompt

---

This section details on the original issue you should resolve

<issue_title>215</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @codex[agent] in this section)

• Fixes 215 #217