[Bug]: different request bodies uesd by query llm and index llm

[kebuAAA]

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Describe the bug

I'm a little confuse why the request body of query llm doesn't follow the standard just as the index llm(set the llm type to "openai_chat"). Take the query question "1+2=?" as an example. The request body of query llm seems to be like following structure(just list the data parameter):

{
"messages":"1+2=?"
}

This is not the standard request body of openai:

{
"messages":[
      {
        "role": "user",
        "content": "1+2=?"
      }
],
}

I wonder why the request body of queryllm and index llm differ, thanks for your time.

Steps to reproduce

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Expected Behavior

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GraphRAG Config Used

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Logs and screenshots

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Additional Information

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