ALTER TABLE tasks
  ADD COLUMN platform VARCHAR(32) NOT NULL DEFAULT '小红书' AFTER task_type;
-- statement-breakpoint
ALTER TABLE tasks
  ADD COLUMN content_format VARCHAR(32) NOT NULL DEFAULT 'image_text' AFTER platform;
-- statement-breakpoint
ALTER TABLE contents
  ADD COLUMN video_assets LONGTEXT NOT NULL DEFAULT ('[]') AFTER image_assets;
-- statement-breakpoint
ALTER TABLE distributions
  ADD COLUMN latest_shares INT NULL AFTER latest_collects;
-- statement-breakpoint
ALTER TABLE collection_runs
  ADD COLUMN shares INT NULL AFTER collects;