chore(deps): update mcp requirement from ~=1.26.0 to >=1.26,<1.28

Updates the requirements on [mcp](https://github.com/modelcontextprotocol/python-sdk) to permit the latest version.
- [Release notes](https://github.com/modelcontextprotocol/python-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/python-sdk/blob/main/RELEASE.md)
- [Commits](modelcontextprotocol/python-sdk@v1.26.0...v1.27.0)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 1.27.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -35,7 +35,7 @@ classifiers = [
     "Framework :: FastAPI",
 ]
 dependencies = [
-    "mcp~=1.26.0",
+    "mcp>=1.26,<1.28",
     "fastmcp~=2.14.0",
     "pydantic~=2.12.0",
     "httpx~=0.28.0",