Create chat completions

curl --request POST \
  --url https://{cluster}.cognitedata.com/api/v1/projects/{project}/ai/openai/chat/completions \
  --header 'Authorization: Bearer <token>' \
  --header 'content-type: <content-type>' \
  --data '
{
  "messages": [
    {
      "content": "What is the capital of France?",
      "role": "user"
    }
  ],
  "model": "azure/gpt-4.1",
  "stream": false
}
'

{
  "choices": [
    {
      "finish_reason": "stop",
      "index": 0,
      "message": {
        "content": "The capital of France is Paris.",
        "role": "assistant"
      }
    }
  ],
  "created": 1715000000,
  "id": "chatcmpl-abc123",
  "model": "azure/gpt-4.1",
  "object": "chat.completion",
  "usage": {
    "completion_tokens": 8,
    "prompt_tokens": 14,
    "total_tokens": 22
  }
}