Mysql binlog zstd compression refactor rework#179
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…oadEventBuffer Transparently unpacks zstd/none-compressed TRANSACTION_PAYLOAD events, re-emitting their inner events as ordinary top-level events. Decompression is streamed/iterated with bounded memory, so transactions whose compressed or uncompressed image exceeds the 2GB byte[] limit (or spans 16MB packets) are handled. The per-payload streaming state machine now lives in a dedicated TransactionPayloadEventBuffer held by EventDeserializer, instead of inline in EventDeserializer (nextEvent simply drains the buffer before reading the stream). Custom TRANSACTION_PAYLOAD deserializers fall back to whole-payload materialization. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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rework of @alexpacio's initial draft