feat: add task workflow and asset downloads

lib/types.ts

@@ -19,6 +19,14 @@ export type GenerationStatus =
   | "expired"
   | "cancelled";
 
+export type WebhookLastStatus = {
+  ok: boolean;
+  status?: number;
+  error?: string;
+  attemptedAt: string;
+  nextAttemptAt?: string;
+};
+
 export type Asset = {
   id: string;
   ownerId: string;
@@ -36,6 +44,7 @@ export type Asset = {
 export type GenerationJob = {
   id: string;
   ownerId: string;
+  externalClientId?: string;
   capability: GenerationCapability;
   provider: "volcengine-visual" | "evolink" | "seedance" | "mock";
   reqKey: string;
@@ -53,6 +62,19 @@ export type GenerationJob = {
     retryable?: boolean;
   };
   retryOf?: string;
+  idempotencyKey?: string;
+  idempotencyFingerprint?: string;
+  priority?: number;
+  attempts?: number;
+  maxAttempts?: number;
+  scheduledAt?: string;
+  lockedAt?: string;
+  lockedBy?: string;
+  startedAt?: string;
+  completedAt?: string;
+  webhookUrl?: string;
+  webhookAttempts?: number;
+  webhookLastStatus?: WebhookLastStatus;
   createdAt: string;
   updatedAt: string;
 };