OpenAI o1 models support 'developer' role instead of 'system' role.

[dolukhanov]

Bug description
According to the OpenAI Guide and the Model Spec the former 'system' role' has now been replaced by the 'developer' role.

The o1 range of models reject the system role within a prompt

Environment
Java: 21
Spring AI: M7
Spring Boot: 3.4.4

Steps to reproduce

Create a Prompt containing a SystemMessage and a UserMessage using an o1 model e.g. o1-mini-2024-09-12

The call fails with:

Caused by: org.springframework.ai.retry.NonTransientAiException: 400 - {
  "error": {
    "message": "Unsupported value: 'messages[0].role' does not support 'system' with this model.",
    "type": "invalid_request_error",
    "param": "messages[0].role",
    "code": "unsupported_value"
  }

Expected behavior
A successful call to Open AI

Minimal Complete Reproducible example

@Component
public class TestOpenAI
{
    private final static Logger log = LoggerFactory.getLogger( TestOpenAI.class );

    private OpenAiChatModel openAiChatModel;

    public TestOpenAI( OpenAiChatModel openAiChatModel )
    {
        this.openAiChatModel = openAiChatModel;
    }

    @PostConstruct
    public void run()
    {
        log.info( "Running OpenAI" );

        OpenAiChatOptions options = OpenAiChatOptions.builder().model( "o1-mini-2024-09-12" ).build();

        SystemMessage systemMessage = new SystemMessage(
                "You are a helpful assistant knowledgable about AI Platforms" );

        UserMessage userMessage = new UserMessage( "Tell me about OpenAI" );

        List<Message> openAiMessages = List.of( systemMessage, userMessage );
        Prompt prompt = new Prompt( openAiMessages, options );

        ChatResponse call = openAiChatModel.call( prompt );
        Generation generation = call.getResults().get( 0 );

        System.out.println( generation.getOutput().getText() );

    }
}

[dolukhanov]

Pull request added.