deps: bump @types/node from 25.5.0 to 25.6.0 in /mcp-server (#17)

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 25.5.0 to 25.6.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

---
updated-dependencies:
- dependency-name: "@types/node"
  dependency-version: 25.6.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

mcp-server/package-lock.json

@@ -28,7 +28,7 @@
     "zod": "^4.3.6"
   },
   "devDependencies": {
-    "@types/node": "^25.5.0",
+    "@types/node": "^25.6.0",
     "tsx": "^4.19.4",
     "typescript": "^6.0.2",
     "vitest": "^4.1.2"