Return hello from root PATCH endpoint

[Copilot]

The issue required the server behavior to match a simple hello response requirement. This updates the root PATCH handler to return the expected literal response.

• Behavior change
  • Updated PATCH / in patchHandler.js to send hello instead of the previous Patch text.
• Scope
  • No route additions or structural refactors; change is isolated to the existing root PATCH response path.

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