build(deps): bump fastmcp from 3.4.5 to 3.4.6 in /backend (#163)

Bumps [fastmcp](https://github.com/PrefectHQ/fastmcp) from 3.4.5 to 3.4.6.
- [Release notes](https://github.com/PrefectHQ/fastmcp/releases)
- [Changelog](https://github.com/PrefectHQ/fastmcp/blob/main/docs/changelog.mdx)
- [Commits](PrefectHQ/fastmcp@v3.4.5...v3.4.6)

---
updated-dependencies:
- dependency-name: fastmcp
  dependency-version: 3.4.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/pyproject.toml

@@ -26,7 +26,7 @@ dependencies = [
     "slowapi>=0.1.10",
     "redis>=5.0.0",
     "websockets>=16.1.1",
-    "fastmcp>=3.4.5",
+    "fastmcp>=3.4.6",
     "sentry-sdk[fastapi]>=2.66.1",
     # IANA timezone database for Python's stdlib `zoneinfo`.
     # Required on Windows (where the OS doesn't ship the database) and