Suggest to support config frequency_penalty parameters in plugin settings

[qinshulei]

Is your feature request related to a problem? Please describe. Yes.

I use https://docs.perplexity.ai/reference/post_chat_completions for chat api. I find perlexity api don't support frequency_penalty=0 .

for example:

{"temperature":0.3,"top_p":1,"presence_penalty":0,"frequency_penalty":0,"n":1,"model":"sonar-medium-online","messages":[{"role":"user","content":"hello"}],"stream":true}

error:

{"error":{"message":"Frequency penalty must satisfy p > 0.","type":"invalid_parameter","code":400}}

Describe the solution you'd like Support config frequency_penalty parameters in plugin settings.

Describe alternatives you've considered Or don't set frequency_penalty in default request.

Additional context None