Document the auth/RBAC/SSRF hardening in this branch: mandatory strong
SECRET_KEY (server refuses weak/default), admin-only + masked /api-keys,
admin-only /webhooks with SSRF guard, project role hierarchy, and auth
added to previously-open endpoints. Fixed stale Issues→tasks model.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>