KIP-725 — Streamlining configurations for WindowedSerializer and WindowedDeserializer.

Accepted Kafka 3.0 Streams

Deprecates `default.windowed.key.serde.inner` / `default.windowed.value.serde.inner` in `StreamsConfig` and introduces a unified `TimeWindowedSerde` and `SessionWindowedSerde` constructors that combine inner serde and window size in one object. KIP-659's `windowSize` config on `TimeWindowedDeserializer` was inconsistently applied when only one of the inner serde or window size was provided, leading to subtle deserialization errors.

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