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Passing a record batch created by an ESM `apache-arrow` import to `RRFReranker.rerankHybrid` throws an IPC footer parse error. The SDK's CommonJS Arrow writer receives data types from another module instance. Normalize single-record-batch input with the existing table sanitizer before writing IPC. Extend the Arrow 15–21 round-trip test with caller-created batches and nulls, and add a native ESM reranker regression covering 64-bit row IDs, scores, and an empty FTS side. Validation: - Reproduced with published `0.42.0-beta.3`; CommonJS and explicitly normalized ESM controls pass. - Same native module and inputs: all 8 targeted cases fail with the parent serializer and pass with this change. - Local native build, TypeScript build, lint, and formatting pass. - Current-head CI passes on Linux Node 22/24/26, macOS, and Arrow 19/20. The macOS run passes 1,643 tests; Linux Node 24 also passes docs and example checks.