Bump mcp from 1.6.0 to 1.9.3

Bumps [mcp](https://github.com/modelcontextprotocol/python-sdk) from 1.6.0 to 1.9.3.
- [Release notes](https://github.com/modelcontextprotocol/python-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/python-sdk/blob/main/RELEASE.md)
- [Commits](modelcontextprotocol/python-sdk@v1.6.0...v1.9.3)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 1.9.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]