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scripts/migration/lib/__init__.py
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scripts/migration/lib/__init__.py
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"""奇成数据迁移脚本公共库。
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模块组成:
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iccid_utils - ICCID 长度校验 / 19-20 位拆分
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csv_loader - cards.csv / devices.csv 读取与清洗
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mapping_loader - yaml 映射文件加载
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legacy_query - 奇成 MySQL 只读查询封装
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sql_builder - 输出 SQL 构造(CTE + ON CONFLICT)
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"""
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