Bump pydantic-settings from 2.8.1 to 2.9.1 (#132)

Bumps [pydantic-settings](https://github.com/pydantic/pydantic-settings) from 2.8.1 to 2.9.1.
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](pydantic/pydantic-settings@v2.8.1...v2.9.1)

---
updated-dependencies:
- dependency-name: pydantic-settings
  dependency-version: 2.9.1
  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

@@ -2,7 +2,7 @@ couchbase==4.3.5
 fastapi==0.115.12
 httpx==0.28.1
 pydantic==2.11.3
-pydantic_settings==2.8.1
+pydantic_settings==2.9.1
 pytest==8.3.5
 python-dotenv==1.1.0
 uvicorn==0.34.2