Chat completions

curl --request POST \
  --url https://api.case.dev/llm/v1/chat/completions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "messages": [
    {
      "role": "system",
      "content": "<string>"
    }
  ],
  "model": "casemark/casemark-core-3",
  "max_tokens": 1000,
  "temperature": 0.7,
  "stream": false,
  "casemark_show_reasoning": false,
  "top_p": 123,
  "frequency_penalty": 123,
  "presence_penalty": 123
}
'

{
  "id": "<string>",
  "object": "chat.completion",
  "created": 123,
  "model": "<string>",
  "choices": [
    {
      "index": 123,
      "message": {
        "role": "<string>",
        "content": "<string>"
      },
      "finish_reason": "<string>"
    }
  ],
  "usage": {
    "prompt_tokens": 123,
    "completion_tokens": 123,
    "total_tokens": 123,
    "cost": 123
  }
}