Added save_model override to TenantRegistrationAdmin to catch status changes from PENDING to APPROVED and trigger the full activation flow. Previously, changing status via admin form only saved the status field without creating the tenant, sending emails, etc. Now both methods work: - Click "Activate" button (via GET parameter) - Change status dropdown and save (via save_model) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>