- Add app-portainer.tf: OAuth2 provider for Portainer container management
- Add portainer_url variable
- Enable RBAC policy bindings for Grafana, ArgoCD, Home Assistant
- Portainer bound to Infrastructure group policy
RBAC Summary:
- Infrastructure group → Grafana, ArgoCD, Portainer
- Home Automation group → Home Assistant
- Media group → arr stack (existing in app-proxy-arr-stack.tf)
