DataX读取hdfs中包含双引号的字段数据，导致错乱报错问题

hdfs中的数据字段中包含双引号，DataX读取时会将双引号之间的数据当成一个字段进行处理，配置的列分隔符不起作用，导致数据错乱报错，无法将数据从原有大数据集群迁移至MaxCompute中

Start by tracing the DataX HDFS reader's field parsing and separator handling, then reproduce the reported case with a field containing double quotes. Determine the intended treatment of quoted data and verify that migration to MaxCompute preserves fields and reports no parsing errors. The issue names no source file or test, so locating the relevant reader and adding regression coverage will require project familiarity.

Written by the indexing model from the issue text.