KIP-997 — update WindowRangeQuery and unify WindowKeyQuery and WindowRangeQuery

Discussion Streams

Extends `WindowRangeQuery` in the Kafka Streams Interactive Queries API to support dual-key range queries (`keyFrom`, `keyTo`, `timeFrom`, `timeTo`), unifying it with `WindowKeyQuery`. The existing `WindowRangeQuery.fetchAll(timeFrom, timeTo)` fetches all keys in a time window but cannot restrict the key range, forcing clients to post-filter.

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