Bump structlog from 24.2.0 to 24.4.0 in /api

Bumps [structlog](https://github.com/hynek/structlog) from 24.2.0 to 24.4.0.
- [Release notes](https://github.com/hynek/structlog/releases)
- [Changelog](https://github.com/hynek/structlog/blob/main/CHANGELOG.md)
- [Commits](hynek/structlog@24.2.0...24.4.0)

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

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

api/requirements.txt

@@ -2,4 +2,4 @@ dynaconf==3.2.5
 redis==5.0.7
 fastapi==0.111.0
 uvicorn==0.30.6
-structlog==24.2.0
+structlog==24.4.0