【中文说明】用于在分析或导入前检查CSV及表格导出数据，识别缺失值、重复记录、混合类型、异常值、日期格式与编码问题。上传数据并说明字段含义、候选主键和使用目的，让AI输出按优先级排序的质量报告及稳妥的修复建议。 Profiles CSV and spreadsheet exports before you trust them: infers column types and measures missing values, duplicates, mixed types, outliers, date format chaos, and key uniqueness with a tested Python script, then writes a prioritized data quality report with safe fixes.
