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/webhook_handler/main.tf

@@ -194,11 +194,13 @@ resource "kubernetes_ingress_v1" "webhook_handler" {
     name      = "webhook-handler-ingress"
     namespace = kubernetes_namespace.webhook-handler.metadata[0].name
     annotations = {
-      "kubernetes.io/ingress.class" = "nginx"
+      "traefik.ingress.kubernetes.io/router.middlewares" = "traefik-rate-limit@kubernetescrd,traefik-csp-headers@kubernetescrd,traefik-crowdsec@kubernetescrd"
+      "traefik.ingress.kubernetes.io/router.entrypoints" = "websecure"
     }
   }
 
   spec {
+    ingress_class_name = "traefik"
     tls {
       hosts       = ["webhook.viktorbarzin.me"]
       secret_name = var.tls_secret_name