chore(deps): bump fastapi from 0.128.8 to 0.135.3 in /reference (#8)

Bumps [fastapi](https://github.com/fastapi/fastapi) from 0.128.8 to 0.135.3.
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](fastapi/fastapi@0.128.8...0.135.3)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-version: 0.135.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

reference/requirements.lock.txt

@@ -1,5 +1,5 @@
 # Locked direct dependencies for the reference gateway.
 # Refresh by resolving in a Python 3.11+ virtual environment.
-fastapi==0.128.8
+fastapi==0.135.3
 jsonschema==4.25.1
 uvicorn==0.39.0