[Feature Request]: Allow users to provide hl_keywords and ll_kewords as part of the API QueryRequest to avoid having to use the LLM

[Mobious]

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Feature Request Description

Right now, as far as I'm aware, there is no way to use any of the /query API endpoints without LightRAG calling the LLM to extract the high-level and low-level keywords. It would be useful to allow end-users to bypass this by providing the keywords themselves instead of having the LLM try to extract them from the query string. This is particularly useful when using the /query/data endpoint, where users may want to just retrieve data without any LLM processing.

The change would be extremely simple, as all that is required is to add hl_keywords and ll_keywords as parameters for the QueryRequest class. QueryRequest.to_query_param already handles passing these along when creating the QueryParam instance, which already supports hl_keywords and ll_keywords.

Additional Context

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