chore(deps): bump pydantic-settings from 2.12.0 to 2.13.1

Bumps [pydantic-settings](https://github.com/pydantic/pydantic-settings) from 2.12.0 to 2.13.1.
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](pydantic/pydantic-settings@v2.12.0...v2.13.1)

---
updated-dependencies:
- dependency-name: pydantic-settings
  dependency-version: 2.13.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -39,7 +39,7 @@ openai==2.16.0
 # ------------
 python-dotenv==1.2.1
 pydantic==2.12.5
-pydantic-settings==2.12.0
+pydantic-settings==2.13.1
 python-hcl2==7.3.1
 
 # Lambda layer: langchain