IBM i data queue consumers and queue APIs

Data queues can now be configured as running consumers that decode entries and publish them to webhooks or Kafka with reusable gateway credentials. The same screen can define producer APIs and request-reply queue APIs, publish them through the catalog, and expose them as REST endpoints. [[feature:dataq-support|IBM i data queues: browse, consume, and publish queue APIs]] keeps queue ownership, keyed reads, reply matching, and error handling visible so operators can avoid conflicting readers and writers.