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68626bf3a1
Fork sketches-ddsketch as a workspace member to add native Java binary serialization (to_java_bytes/from_java_bytes) for DDSketch. This enables pomsky to return raw DDSketch bytes that event-query can deserialize via DDSketchWithExactSummaryStatistics.decode(). Key changes: - Vendor sketches-ddsketch crate with encoding.rs implementing VarEncoding, flag bytes, and INDEX_DELTAS_AND_COUNTS store format - Align Config::key() to floor-based indexing matching Java's LogarithmicMapping - Add PercentilesCollector::to_sketch_bytes() for pomsky integration - Cross-language golden byte tests verified byte-identical with Java output Co-authored-by: Cursor <cursoragent@cursor.com>