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/privatebin/main.tf

@@ -89,13 +89,11 @@ resource "kubernetes_service" "privatebin" {
 }
 
 module "ingress" {
-  source                           = "../ingress_factory"
-  namespace                        = kubernetes_namespace.privatebin.metadata[0].name
-  name                             = "privatebin"
-  host                             = "pb"
-  tls_secret_name                  = var.tls_secret_name
-  rybbit_site_id                   = "3ae810b0476d"
-  additional_configuration_snippet = <<-EOF
-    more_set_headers "Content-Security-Policy: script-src 'self' 'unsafe-inline' 'unsafe-eval' 'wasm-unsafe-eval' https://rybbit.viktorbarzin.me";
-  EOF
+  source                         = "../ingress_factory"
+  namespace                      = kubernetes_namespace.privatebin.metadata[0].name
+  name                           = "privatebin"
+  host                           = "pb"
+  tls_secret_name                = var.tls_secret_name
+  rybbit_site_id                 = "3ae810b0476d"
+  custom_content_security_policy = "script-src 'self' 'unsafe-inline' 'unsafe-eval' 'wasm-unsafe-eval' https://rybbit.viktorbarzin.me"
 }