`SoftwareCatalogApi.list_catalog_entity` does not filter services when `filter_name` is passed

[meestermuffin]

Describe the bug
I have tried to pass in variations of filter_name such as filter_name=app_name, filter_name=f"name:{app_name}", and filter_name=f"service:{app_name}". The results always return the services in alphabetical order. I have verified the services I'm filtering exist.

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To Reproduce
Steps to reproduce the behavior:

def associate_datadog_teams(app_name: str, owner: str) -> str:
    if not app_name or not isinstance(app_name, str):
        raise ValueError("Invalid app_name provided")
    if not owner or not isinstance(owner, str):
        raise ValueError("Invalid owner provided")

    # Make sure application key is available under the env var the SDK expects
    if os.getenv("DD_APP_KEY") is None and os.getenv("DD_APPLICATION_KEY"):
        os.environ["DD_APP_KEY"] = os.environ["DD_APPLICATION_KEY"]

    # Validate required credentials are present
    if not os.getenv("DD_API_KEY") or not os.getenv("DD_APP_KEY"):
        raise ValueError(
            "Missing Datadog credentials. Ensure DD_API_KEY and DD_APP_KEY (or DD_APPLICATION_KEY) are set."
        )

    # Helper for safely getting nested attributes whether SDK returns models or dicts
    def _get(obj, path: list[str], default=None):
        cur = obj
        for key in path:
            if cur is None:
                return default
            if isinstance(cur, dict):
                cur = cur.get(key)
            else:
                cur = getattr(cur, key, None)
        return cur if cur is not None else default

    # Search for service by exact name
    configuration = Configuration()
    with ApiClient(configuration) as api_client:
        api = SoftwareCatalogApi(api_client)
        try:
            resp = api.list_catalog_entity(filter_name=f"service:{app_name}", filter_kind="service", page_limit=5)
        except Exception as e:
            raise ValueError(f"Failed to query Datadog Software Catalog: {e}") from e
        
        print("Services returned by API:")
        for item in resp.data:
            service_name = item.attributes.name
            print(f"  - {service_name}")
        print()

        items = _get(resp, ["data"], [])
        # Find an exact name match among returned items
        matched = None
        for it in items or []:
            name = _get(it, ["attributes", "name"]) or _get(it, ["attributes", "metadata", "name"])  # fallback
            if name == app_name:
                matched = it
                break

        if not matched:
            return f"Service '{app_name}' not found in Datadog Service Catalog. Skipping association."

Expected behavior

It should return the service I'm passing as filter_name.

Screenshots
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Environment and Versions (please complete the following information):
A clear and precise description of your setup:
datadog_api_client==2.40.0

[meestermuffin]

As a follow up, is there a where to query and list services that DO NOT have ownership and metadata using the software catalog API?

[github-actions]

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