Kafka idempotent producer

RU: Kafka idempotent producer

A Kafka producer configured with enable.idempotence=true that receives a unique producer ID (PID) from the broker at startup. It tags every record batch with the PID and a monotonically increasing sequence number per topic-partition. The broker rejects batches with a sequence number it has already committed, deduplicating retries within a single producer session and guaranteeing per-partition exactly-once writes.