KIP-1285 — DSL Opt-in Support for Headers-Aware State Stores

Accepted Kafka 4.3 Streams

Wires KIP-1271's headers-aware state store implementations into the Kafka Streams DSL via an explicit opt-in mechanism, allowing operators like table(), aggregate(), and join() to use header-preserving stores. Without this DSL integration, developers using the high-level API had no path to adopt header-aware stores even after KIP-1271 provided the underlying interfaces.

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