Cant patch a deployment using Java Kubernetes API library

[max-b2c2]

Describe the bug
Unable to patch a namespace deployment using java kubernetes library. Results in HTTP 415, issue being incorrect Content-Type header set by library.

Client Version
24.0.0

Kubernetes Version
1.33.5

Java Version
17

To Reproduce

ApiClient client = Config.defaultClient();
Configuration.setDefaultApiClient(client);
AppsV1Api api = new AppsV1Api(client);

String timeNow = java.time.Instant.now().toString();
String patchJson = """
                    {
                        "spec": {
                            "template": {
                                "metadata": {
                                    "annotations": {
                                        "kubectl.kubernetes.io/restartedAt": "%s"
                                    }
                                }
                            }
                        }
                    }
""".formatted(timeNow);

AppsV1Api.APIpatchNamespacedDeploymentRequest apIpatchNamespacedDeploymentRequest =
api.patchNamespacedDeployment(
"some-deployment-name",
"some-namespace",
new V1Patch(patchJson));

apIpatchNamespacedDeploymentRequest.execute();

Expected behavior
HTTP 200 resulting in deployment patch

KubeConfig
wont provide for now

Server (please complete the following information):

• OS: macOS Sequoia 15.5
• Environment: local
• Cloud ???

Additional context
it seems the fault lies at io.kubernetes.client.openapi.apis.AppsV1Api:9231, it sets Content-Type header value to application/json where it should be application/strategic-merge-patch+json according to docs here
This has a workaround but that shouldnt be the case

PatchUtils.patch(
                    V1Deployment.class,
                    () -> client.buildCall(
                            null,
                            String.format(
                                    "/apis/apps/v1/namespaces/%s/deployments/%s",
                                    namespaceParam,
                                    deploymentParam),
                            "PATCH",
                            new ArrayList<>(),
                            new ArrayList<>(),
                            new V1Patch(PATCH_JSON.formatted(timeNow)),
                            HEADERS,
                            new HashMap<>(),
                            new HashMap<>(),
                            new String[] {"BearerToken"},
                            null),
                    "application/strategic-merge-patch+json");

and this issue was mentioned twice already here and here

[brendandburns]

This code is generated from the open api specification which has multiple potential content-types. The code generator doesn't know the right one to use, so it uses the first one. Using PatchUtils is the right way to work around these challenges with the code generator.