KIP-763 — Range Queries with Open Endpoints

Accepted Kafka 3.1 Streams

Adds unbounded (null-terminated) range and reverse-range queries to Kafka Streams `ReadOnlyKeyValueStore` so callers can scan from a lower bound to the end of the store, or from an upper bound to the beginning. The existing `range(K from, K to)` required both bounds, forcing workarounds for open-ended scans.

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