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[BUG]The Aligner Limitation (Nested Panel Data) #491

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@Shashankss1205

When I instantiated AlignerDTW and tried to call mcp_sktime_fit(dataset="airline"), the MCP server returned exactly this:

{
  "success": false,
  "error": "{'df-list': \"X must be of python type list, or a subtype thereof, but found <class 'pandas.core.series.Series'>\"}"
}

Limitation: Aligners mathematically align multiple time series, so their native fit() method strictly requires a Python list of DataFrames/Series (e.g. X=[df1, df2]). The MCP tool mcp_sktime_fit accepts a single dataset parameter and loads a single DataFrame. There is currently no schema design in the tools for an LLM to say "Load these 5 datasets and pass them as a single list to X".

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