Horizontal scale-out of the deployed group per user request - all other requirements unchanged. terraform apply added only router4 and its 2 private ports (3 added, 0 changed, 0 destroyed); the existing 3 routers were untouched. Deployment summary updated with router4's addresses. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011hXR2ftXZZhJ4Y3XuSoR8r