Add a self-contained Playwright E2E test suite that runs against a local
PostgreSQL database instead of Neon. Tests cover role-based access for all
5 user roles (proxy admin, admin viewer, internal user, internal viewer,
team admin) and authentication flows.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Yuneng Jiang