.env.development had a real Postgres/Redis password and JWT secret
committed in plain text; .env.test and .env.prod were tracked too.
Untrack all .env* files going forward and add .env.example as the
onboarding template instead.
Note: the exposed dev credentials are still in git history and must
be rotated separately.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>