Designs the Kafka producer/consumer adapter for an already-modeled domain event — topic, partition key, serialization, consumer group, delivery semantics, retries and DLQ — into the `25-mensageria.md` partial. Use when the request involves publishing a domain event to Kafka, consuming a Kafka topic, designing a producer or consumer adapter, deciding topic/partition/serialization, or wiring retry/DLQ for a message listener. Piece of the `/new-feature` pipeline: requires `10-dominio.md` in the given folder with an Events block that names external delivery, and stops without it.
