build(deps): bump mcp from 1.9.4 to 1.15.0

Bumps [mcp](https://github.com/modelcontextprotocol/python-sdk) from 1.9.4 to 1.15.0.
- [Release notes](https://github.com/modelcontextprotocol/python-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/python-sdk/blob/main/RELEASE.md)
- [Commits](modelcontextprotocol/python-sdk@v1.9.4...1.15.0)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 1.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -27,7 +27,7 @@ classifiers = [
 ]
 version = "0.9.0"
 requires-python = ">=3.10"
-dependencies = ["mcp==1.9.4", "uvicorn>=0.34.0"]
+dependencies = ["mcp==1.15.0", "uvicorn>=0.34.0"]
 
 [build-system]
 requires = ["setuptools"]