Bump structlog from 24.4.0 to 25.1.0 in /flowmachine

Bumps [structlog](https://github.com/hynek/structlog) from 24.4.0 to 25.1.0.
- [Release notes](https://github.com/hynek/structlog/releases)
- [Changelog](https://github.com/hynek/structlog/blob/main/CHANGELOG.md)
- [Commits](hynek/structlog@24.4.0...25.1.0)

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

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