Migrate all service modules from nginx-ingress to Traefik

- Remove nginx-specific ingress variables (use_proxy_protocol, proxy_timeout, additional_configuration_snippet)
- Update ingress annotations to use Traefik middleware CRDs
- Delete nginx-ingress module (replaced by traefik)
- Add new traefik middleware.tf for shared middleware definitions
- Update service modules to work with new ingress_factory interface

modules/kubernetes/tuya-bridge/main.tf

@@ -97,13 +97,4 @@ module "ingress" {
   namespace       = kubernetes_namespace.tuya-bridge.metadata[0].name
   name            = "tuya-bridge"
   tls_secret_name = var.tls_secret_name
-
-  extra_annotations = {
-    "nginx.ingress.kubernetes.io/server-snippet" : <<-EOF
-      location /metrics {
-        deny all;
-        return 403;
-      }
-      EOF
-  }
 }