export interface Device {
  /** Internal row id used for persistence updates. */
  id: string;
  /** Client-provided stable physical device identity. */
  deviceId: string;
  fcmToken: string;
  platform: "ios" | "android" | "web";
  createdAt: Date;
  updatedAt: Date;
  /** Epoch ms; set only after a successful push send. */
  lastNotifiedAt?: number;
}