Bump fastapi from 0.120.3 to 0.121.0 (#174)

Bumps [fastapi](https://github.com/fastapi/fastapi) from 0.120.3 to 0.121.0.
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](fastapi/fastapi@0.120.3...0.121.0)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-version: 0.121.0
  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]

requirements.txt

@@ -1,5 +1,5 @@
 couchbase==4.5.0
-fastapi==0.120.3
+fastapi==0.121.0
 httpx==0.28.1
 pydantic==2.12.3
 pydantic_settings==2.11.0