CREATE TABLE IF NOT EXISTS "DingTalkNotificationTask" (
  "id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
  "title" varchar(100) NOT NULL,
  "content" text NOT NULL,
  "status" varchar(24) NOT NULL DEFAULT 'pending',
  "scheduledAt" timestamp NOT NULL,
  "attempts" integer NOT NULL DEFAULT 0,
  "lastAttemptAt" timestamp,
  "sentAt" timestamp,
  "cancelledAt" timestamp,
  "lastError" text,
  "createdBy" uuid REFERENCES "User"("id"),
  "createdAt" timestamp NOT NULL DEFAULT now(),
  "updatedAt" timestamp NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS "DingTalkNotificationTask_status_scheduledAt_idx"
  ON "DingTalkNotificationTask" ("status", "scheduledAt");

CREATE INDEX IF NOT EXISTS "DingTalkNotificationTask_createdAt_idx"
  ON "DingTalkNotificationTask" ("createdAt");