添加或修改应商模型

curl --location --request POST '/boss/api/model-providers/<string:provider>/models' \
--header 'Content-Type: application/json' \
--data-raw '{
    "model": "string",
    "model_type": "string",
    "credentials": {
        "invoke_timeout": "string",
        "max_retries": "string",
        "server_url": "string",
        "model_uid": "string"
    },
    "load_balancing": {
        "enabled": true,
        "configs": [
            "string"
        ]
    }
}'