Arize Phoenix TS
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    MessageWithProvider:
        | {
            provider: Extract<PromptSDKFormat, "OPENAI" | "AZURE_OPENAI">;
            validatedMessage: OpenAIMessage;
        }
        | {
            provider: Extract<PromptSDKFormat, "ANTHROPIC">;
            validatedMessage: AnthropicMessage;
        }
        | {
            provider: Extract<PromptSDKFormat, "PHOENIX">;
            validatedMessage: PhoenixMessage;
        }
        | {
            provider: Extract<PromptSDKFormat, "VERCEL_AI">;
            validatedMessage: VercelAIMessage;
        }
        | { provider: null; validatedMessage: null }