-- Walk-forward 运行头（plan.md §23）
-- 由 src/hdiv/data/schema.py 生成，请勿手工修改
CREATE TABLE IF NOT EXISTS `hd_walkforward_run` (
  `wf_id`           VARCHAR(32)  NOT NULL,
  `strategy_id`     VARCHAR(32)  NOT NULL,
  `strategy_version` VARCHAR(16) NOT NULL,
  `config_json`     MEDIUMTEXT   NOT NULL,
  `config_hash`     VARCHAR(64)  NOT NULL,
  `scheme`          VARCHAR(16)  NOT NULL COMMENT 'rolling/expanding',
  `train_years`     INT          NOT NULL,
  `test_years`      INT          NOT NULL,
  `step_months`     INT          NOT NULL,
  `window_count`    INT          NOT NULL DEFAULT 0,
  `data_version`    VARCHAR(64)  NULL,
  `code_version`    VARCHAR(32)  NULL,
  `status`          VARCHAR(16)  NOT NULL DEFAULT 'OK',
  `created_at`      DATETIME     NOT NULL,
  PRIMARY KEY (`wf_id`),
  KEY `ix_hd_wf_strategy` (`strategy_id`,`strategy_version`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT='Walk-forward 运行头';