Root cause: milestone test was the first to run after global-setup completed
the wizard configuration. The backend needed time to detect the config file
and run database migrations, but tests started immediately. This caused
/auth/token requests to fail with net::ERR_FAILED.
Changes:
- global-setup.ts: after wizard setup, poll backend /docs until it returns 200
- milestone.spec.ts: add retry loop (max 3 attempts) for login as extra safety
and assert token presence before proceeding
- global-setup.ts: configures wizard before tests run
- playwright.config.ts: uses globalSetup
- wizard.spec.ts: simplified to just verify frontend loads
