TimeSeries factory fails when passed existing TimeSeries objects or MetaDict

TimeSeries factory fails when passed existing TimeSeries objects or MetaDict: a task in harbor-swesmith-rl-artifacts: Harbor SWE-Smith 强化学习数据产物 (Harbor dataset). When creating a TimeSeries from an existing TimeSeries object or when using MetaDict objects, the factory method crashes with type errors.

The task

When creating a TimeSeries from an existing TimeSeries object or when using MetaDict objects, the factory method crashes with type errors.

Part of keryszhan/harbor-swesmith-rl-artifacts.