Fix cross-platform CI checks

[romainsacchi]

Summary

• apply the repository's Black formatting to the two files rejected by the quality job
• remove one placeholder-free f-string exposed by the now-running Ruff step
• force LF checkouts for the integrity-manifested SimaPro category CSV so Git on Windows does not change its hash and size

Root cause

The quality job stopped at Black, hiding a Ruff failure in a later step. Separately, .gitattributes forced LF only for JSON resources. Windows therefore checked out the manifested category CSV with CRLF bytes, causing five integrity failures and one downstream missing-category assertion.

Validation

• black --check brightpath tests docs/conf.py
• python -m isort --check-only brightpath tests docs/conf.py
• python -m ruff check brightpath tests docs/conf.py
• python -m bandit -r brightpath
• python -m sphinx -W --keep-going -b html docs docs/_build/html
• pytest -q --cov=brightpath — 398 passed, 3 skipped
• python -m build
• autocrlf-enabled staged checkout: pytest -q tests/test_simapro_categories.py — 8 passed