fix: address PR review comments for basic auth and path pattern

- Add basic auth ExtensionRef filter to gRPC routes (matching HTTP routes)
- Restrict path regex pattern to exclude {, }, ;, ^ characters

Author: unni-facets

modules/ingress/nginx_gateway_fabric_legacy/1.0/facets.yaml

@@ -298,7 +298,7 @@ spec:
               type: string
               title: Path
               description: Path of the application (required for HTTP routes)
-              pattern: ^(/[^\s]*)$
+              pattern: ^(/[^\s{};^]*)$
               x-ui-placeholder: "Enter path (e.g., / or /api or /api/v[0-9]+)"
               x-ui-error-message: "Path must start with /"
               x-ui-visible-if:

modules/ingress/nginx_gateway_fabric_legacy/1.0/main.tf

@@ -477,6 +477,16 @@ locals {
             }
           ] : []
 
+          # Basic auth filter (applied when basic_auth is enabled and route doesn't have disable_auth)
+          filters = lookup(var.instance.spec, "basic_auth", false) && !lookup(v, "disable_auth", false) ? [{
+            type = "ExtensionRef"
+            extensionRef = {
+              group = "gateway.nginx.org"
+              kind  = "AuthenticationFilter"
+              name  = "${local.name}-basic-auth"
+            }
+          }] : []
+
           backendRefs = [{
             name      = v.service_name
             port      = tonumber(v.port)