Bump @google/genai from 2.17.1 to 2.19.0 in /mcpb

Bumps [@google/genai](https://github.com/googleapis/js-genai) from 2.17.1 to 2.19.0.
- [Release notes](https://github.com/googleapis/js-genai/releases)
- [Changelog](https://github.com/googleapis/js-genai/blob/main/CHANGELOG.md)
- [Commits](googleapis/js-genai@v2.17.1...v2.19.0)

---
updated-dependencies:
- dependency-name: "@google/genai"
  dependency-version: 2.19.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

mcpb/package-lock.json

@@ -58,7 +58,7 @@
   },
   "dependencies": {
     "@duckdb/node-api": "^1.5.4-r.1",
-    "@google/genai": "^2.17.1",
+    "@google/genai": "^2.19.0",
     "@modelcontextprotocol/node": "^2.0.0",
     "@modelcontextprotocol/server": "^2.0.0",
     "zod": "^4.4.3"