CREATE TABLE IF NOT EXISTS short_drama_visual_asset (
 id bigint NOT NULL PRIMARY KEY,
 project_id bigint NOT NULL,
 tenant_id varchar(20) NOT NULL DEFAULT '000000',
 storyboard_id bigint DEFAULT NULL,
 asset_key varchar(180) NOT NULL,
 kind varchar(24) NOT NULL,
 title varchar(255) NOT NULL,
 prompt longtext,
 reference_images longtext,
 source_hash varchar(64),
 status varchar(24) NOT NULL DEFAULT 'pending',
 image_url text,
 model varchar(255),
 prediction_id varchar(255),
 error_message text,
 create_time datetime DEFAULT CURRENT_TIMESTAMP,
 update_time datetime DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
 UNIQUE KEY uk_project_asset (project_id,asset_key),
 KEY idx_storyboard (storyboard_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='道具资产和逐镜关键帧，可续跑';