Switch extractor-workflow e2e test from vitest to Playwright test runner
for consistency with playwright.config.ts. Remove redundant unit tests
(cleaner, erp-auth, extractor) that have been superseded by more thorough
replacements under tests/unit/services/erp/. Enable test isolation
unconditionally to prevent cross-file state pollution.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>