Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/migrations/164_batch_image_download_and_user_delete.sql

@@ -0,0 +1,9 @@
+ALTER TABLE batch_image_jobs
+    ADD COLUMN IF NOT EXISTS downloaded_at TIMESTAMPTZ,
+    ADD COLUMN IF NOT EXISTS user_deleted_at TIMESTAMPTZ;
+
+CREATE INDEX IF NOT EXISTS batch_image_jobs_downloaded_at_idx ON batch_image_jobs (downloaded_at);
+CREATE INDEX IF NOT EXISTS batch_image_jobs_user_deleted_at_idx ON batch_image_jobs (user_deleted_at);
+
+COMMENT ON COLUMN batch_image_jobs.downloaded_at IS '用户首次成功下载批量图片 ZIP 的时间';
+COMMENT ON COLUMN batch_image_jobs.user_deleted_at IS '用户侧删除/隐藏任务记录的时间；账务记录仍保留';