Address code review comments - add clarifying comments and fix imports

Co-authored-by: brendandburns <[email protected]>

Author: Copilot

util/src/main/java/io/kubernetes/client/util/Yaml.java

@@ -630,6 +630,8 @@ public static Object createResource(io.kubernetes.client.openapi.ApiClient clien
   public static Object createResource(io.kubernetes.client.openapi.ApiClient client, Reader reader)
       throws IOException, io.kubernetes.client.openapi.ApiException {
     // Load the YAML as a map to extract apiVersion and kind
+    // Note: The getSnakeYaml() method already configures LoaderOptions with appropriate
+    // security settings to prevent YAML bombs and other attacks
     Map<String, Object> data = getSnakeYaml(null).load(reader);
 
     String kind = (String) data.get("kind");
@@ -649,6 +651,8 @@ public static Object createResource(io.kubernetes.client.openapi.ApiClient clien
     }
 
     // Load the YAML into the strongly typed object
+    // Note: This double-loading approach (first as Map, then as typed object) follows the
+    // design recommended in the issue discussion to properly handle type determination
     Object resource = loadAs(new StringReader(getSnakeYaml(clazz).dump(data)), clazz);
 
     // Ensure the resource is a KubernetesObject
@@ -703,6 +707,7 @@ public static Object createResource(io.kubernetes.client.openapi.ApiClient clien
       // For namespaced resources
       String namespace = k8sObject.getMetadata().getNamespace();
       if (namespace == null || namespace.isEmpty()) {
+        // Default to "default" namespace, matching kubectl behavior
         namespace = "default";
       }
       response = api.create(namespace, k8sObject, new io.kubernetes.client.util.generic.options.CreateOptions());

util/src/test/java/io/kubernetes/client/util/YamlCreateResourceTest.java

@@ -22,6 +22,7 @@
 import io.kubernetes.client.openapi.models.V1ConfigMap;
 import io.kubernetes.client.openapi.models.V1Deployment;
 import io.kubernetes.client.openapi.models.V1Pod;
+import io.kubernetes.client.util.ClientBuilder;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;