Interface SpeechUsageEvent

interface SpeechUsageEvent {
    botId?: string;
    durationMs: number;
    eventId?: string;
    kind: "speech" | "transcription";
    model: string;
    provider: SpeechProvider;
    sessionId?: string;
    speechUsage: SpeechUsageMetrics;
    tenantId?: string;
    timestamp: string;
}