Create an article type. Article types are a shared, platform-managed catalog (not scoped to a single account) — creating one requires the elevated locations-directory:support scope, not the regular locations-directory:write scope used for per-account writes elsewhere in the Locations Directory APIs.

name must be unique (case-insensitive) across all article types.

When content_type is JSON, json_schema is required and is validated for compilability; articles of this type will later be validated against it.

ingestion_task_queue and ingestion_workflow_name route an optional async content-ingestion workflow (Temporal) for this type. They must either both be provided, or both be omitted — both unset means ingestion isn't configured for this type.