Update mcp requirement from >=1.0.0 to >=1.27.0

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@v1.0.0...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]

requirements/base.txt

@@ -77,7 +77,7 @@ jsonschema==4.26.0
 
 # Model Context Protocol
 # ------------------------------------------------------------------------------
-mcp>=1.0.0  # https://github.com/anthropics/python-sdk
+mcp>=1.27.0  # https://github.com/anthropics/python-sdk
 
 # Not directly required, pinned by Snyk to avoid a vulnerability
 # ------------------------------------------------------------------------------