[api changed]: chat api add new field

[Aisuko]

We added a new optional filed named collection_name for supporting RAG at chat API. it will cause issue at v0.1.6.

INFO:     172.18.0.10:42048 - "POST /api/chat HTTP/1.0" 422 Unprocessable Entity

Please help me fit the API.

    sessionUuid: Optional[str] | None
        Session UUID
    message: str
        Message
    temperature: float
        Temperature for inference(float)
    top_k: int
        Top_k parameter for inference(int)
    top_p: float
        Top_p parameter for inference(float)
    n_predict: int
        n_predict parameter for inference(int)
    collection_name: str
        collection name

    curl -X 'POST'
    'http://localhost:8000/api/chat'
    -H 'accept: application/json'
    -H 'Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImFub255bW91cyIsImVtYWlsIjoiYW5vbnltb3VzQGFub255LmNvbSIsImV4cCI6MTcyMTA3MTI0MCwic3ViIjoiWU9VUi1KV1QtU1VCSkVDVCJ9.hip3zPA2yN-MOwKHFOm_KhZuvaC4soY4MgwegyYJu2s'
    -H 'Content-Type: application/json'
    -d '{
    "sessionUuid": "string",
    "message": "do you know RMIT?",
    "temperature": 0.2,
    "topK": 40,
    "topP": 0.9,
    "nPredict": 512,
    "collection_name": aisuko/test
    }'

[cbh778899]

fixed by #49