chore(deps): bump pydantic-settings in /agent-application/backend

Bumps [pydantic-settings](https://github.com/pydantic/pydantic-settings) from 2.12.0 to 2.14.2.
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](pydantic/pydantic-settings@v2.12.0...v2.14.2)

---
updated-dependencies:
- dependency-name: pydantic-settings
  dependency-version: 2.14.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

agent-application/backend/requirements.txt

@@ -24,7 +24,7 @@ mdurl==0.1.2
 pyasn1==0.6.1
 pyasn1_modules==0.4.2
 pydantic==2.12.4
-pydantic-settings==2.12.0
+pydantic-settings==2.14.2
 pydantic_core==2.41.5
 Pygments==2.19.2
 python-dotenv==1.2.1