多余的转义

会将json字符串再进行一次转义，我发送给proxima的就是已经转换成字符串类型的数据，结果proxima又给我加了一次转义，让`\“key\”: \"value\"`变成了，`\\\“key\\\”: \\\"value\\\"`, 请不要做多余的事情

The issue names no files, tests, or entry points. Start by reproducing the reported double-escaping of an already stringified JSON value, then trace where Proxima serializes that value. Done means the existing string is not escaped a second time and coverage verifies the reported input and output.

Written by the indexing model from the issue text.