Bump mcp[client,server] from 1.9.2 to 1.9.4

Bumps [mcp[client,server]](https://github.com/modelcontextprotocol/python-sdk) from 1.9.2 to 1.9.4.
- [Release notes](https://github.com/modelcontextprotocol/python-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/python-sdk/blob/main/RELEASE.md)
- [Commits](modelcontextprotocol/python-sdk@v1.9.2...v1.9.4)

---
updated-dependencies:
- dependency-name: mcp[client,server]
  dependency-version: 1.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-mcp[client,server]==1.9.2
+mcp[client,server]==1.9.4
 fastapi==0.115.12
 uvicorn==0.34.3
 python-dotenv==1.1.0