build(deps-dev): bump isort from 7.0.0 to 8.0.0 in /backend

Bumps [isort](https://github.com/PyCQA/isort) from 7.0.0 to 8.0.0.
- [Release notes](https://github.com/PyCQA/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/main/CHANGELOG.md)
- [Commits](PyCQA/isort@7.0.0...8.0.0)

---
updated-dependencies:
- dependency-name: isort
  dependency-version: 8.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]