build(deps): bump pydantic-settings in /src/backend-api

Bumps [pydantic-settings](https://github.com/pydantic/pydantic-settings) from 2.13.1 to 2.14.2.
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](pydantic/pydantic-settings@v2.13.1...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]

src/backend-api/pyproject.toml

@@ -15,7 +15,7 @@ dependencies = [
     "azure-storage-queue==12.15.0",
     "fastapi[standard]==0.135.3",
     "httpx==0.28.1",
-    "pydantic-settings==2.13.1",
+    "pydantic-settings==2.14.2",
     "python-dotenv==1.2.2",
     "python-multipart==0.0.27",
     "protobuf==7.34.0",