chore(deps): Bump polyfactory from 2.18.0 to 2.19.0 in /schemas

Bumps [polyfactory](https://github.com/litestar-org/polyfactory) from 2.18.0 to 2.19.0.
- [Release notes](https://github.com/litestar-org/polyfactory/releases)
- [Changelog](https://github.com/litestar-org/polyfactory/blob/main/docs/changelog.rst)
- [Commits](litestar-org/polyfactory@v2.18.0...v2.19.0)

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

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