Function resolveIntegrationDeadLetter

Returns
    | {
        agentId: string;
        attempts: number;
        channelId: string;
        deadLetterId: string;
        deliveryId: string;
        error: string
        | null;
        eventName: string;
        httpStatus: number | null;
        payloadSha256: string;
        receipt: unknown;
        resolved: boolean;
        resolvedTs: number | null;
        sequence: number;
        ts: number;
        url: string;
    }
    | null