[cherry-pick] fix: add support for numpy integer types in JSON serialization #4581
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修复 _format_data 函数未处理 numpy 整数类型(np.int32, np.int64)的问题, 防止 OCR 结果中包含 numpy 整数坐标时出现 JSON 序列化错误。
修复内容:
Fixes JSON serialization errors when OCR results contain numpy integer coordinates.
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