type RunAwaitable = 
  | {
  deadline?: number;
  meta?: WorkflowMetadata;
  signalName: string;
  stepId?: string;
  type: "signal";
}
  | {
  approvalId: string;
  description?: string;
  meta?: WorkflowMetadata;
  stepId?: string;
  title: string;
  type: "approval";
};

type RunAwaitable = 
  | {
  deadline?: number;
  meta?: WorkflowMetadata;
  signalName: string;
  stepId?: string;
  type: "signal";
}
  | {
  approvalId: string;
  description?: string;
  meta?: WorkflowMetadata;
  stepId?: string;
  title: string;
  type: "approval";
};