Bump pydantic-settings from 2.5.2 to 2.6.1

Bumps [pydantic-settings](https://github.com/pydantic/pydantic-settings) from 2.5.2 to 2.6.1.
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](pydantic/pydantic-settings@v2.5.2...v2.6.1)

---
updated-dependencies:
- dependency-name: pydantic-settings
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -35,7 +35,7 @@ dependencies = [
     "httpx==0.28.0",
     "uvicorn[standard]==0.32.0",
     "requests==2.32.3",
-    "pydantic-settings==2.5.2",
+    "pydantic-settings==2.6.1",
     "celery==5.4.0",
     "redis==5.2.0",
 ]