Bump fastmcp from 2.11.3 to 2.13.0 in /src/mcp_server

Bumps [fastmcp](https://github.com/jlowin/fastmcp) from 2.11.3 to 2.13.0.
- [Release notes](https://github.com/jlowin/fastmcp/releases)
- [Changelog](https://github.com/jlowin/fastmcp/blob/main/docs/changelog.mdx)
- [Commits](PrefectHQ/fastmcp@v2.11.3...v2.13.0)

---
updated-dependencies:
- dependency-name: fastmcp
  dependency-version: 2.13.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

src/mcp_server/pyproject.toml

@@ -15,7 +15,7 @@ dynamic = ["version"]
 
 # Core runtime dependencies (kept in sync with requirements.txt)
 dependencies = [
-  "fastmcp==2.11.3",
+  "fastmcp==2.13.0",
   "uvicorn[standard]==0.32.1",
   "python-dotenv==1.1.1",
   "azure-identity==1.19.0",