新功能(#79): 实现促销管理接口并支持数量配价

Co-authored-by: multica-agent <github@multica.ai>

initialize/migrate/database/02154_promo_admin_api.down.sql

@@ -0,0 +1,3 @@
+DROP TABLE IF EXISTS `promo_usage`;
+DROP TABLE IF EXISTS `subscribe_promo`;
+DROP TABLE IF EXISTS `promo_rule`;

initialize/migrate/database/02154_promo_admin_api.up.sql

@@ -0,0 +1,42 @@
+CREATE TABLE IF NOT EXISTS `promo_rule` (
+  `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  `name` VARCHAR(100) NOT NULL DEFAULT '' COMMENT '规则名称',
+  `type` VARCHAR(32) NOT NULL DEFAULT '' COMMENT '规则类型：new_user / inactive_user / campaign',
+  `params` JSON NOT NULL COMMENT '类型专属参数',
+  `priority` INT NOT NULL DEFAULT 0 COMMENT '优先级，数值越大越优先匹配',
+  `enabled` TINYINT(1) NOT NULL DEFAULT 1 COMMENT '是否启用',
+  `start_time` DATETIME DEFAULT NULL COMMENT '生效开始时间',
+  `end_time` DATETIME DEFAULT NULL COMMENT '生效结束时间',
+  `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  `deleted_at` DATETIME DEFAULT NULL COMMENT '软删除时间',
+  PRIMARY KEY (`id`),
+  KEY `idx_enabled_priority` (`enabled`, `priority` DESC),
+  KEY `idx_deleted_at` (`deleted_at`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='促销规则表';
+
+CREATE TABLE IF NOT EXISTS `subscribe_promo` (
+  `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  `subscribe_id` BIGINT UNSIGNED NOT NULL COMMENT '套餐规格 ID',
+  `quantity` INT NOT NULL DEFAULT 0 COMMENT '购买数量',
+  `promo_rule_id` BIGINT UNSIGNED NOT NULL COMMENT '促销规则 ID',
+  `promo_price` BIGINT NOT NULL DEFAULT 0 COMMENT '优惠价（分）',
+  `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `idx_subscribe_qty_rule` (`subscribe_id`, `quantity`, `promo_rule_id`),
+  KEY `idx_promo_rule_id` (`promo_rule_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='规格促销价表';
+
+CREATE TABLE IF NOT EXISTS `promo_usage` (
+  `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  `user_id` BIGINT UNSIGNED NOT NULL COMMENT '用户 ID',
+  `promo_rule_id` BIGINT UNSIGNED NOT NULL COMMENT '促销规则 ID',
+  `subscribe_id` BIGINT UNSIGNED NOT NULL COMMENT '套餐规格 ID',
+  `order_no` VARCHAR(255) NOT NULL DEFAULT '' COMMENT '关联订单号',
+  `promo_price` BIGINT NOT NULL DEFAULT 0 COMMENT '使用时的促销单价（分）',
+  `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (`id`),
+  KEY `idx_user_rule` (`user_id`, `promo_rule_id`),
+  KEY `idx_order_no` (`order_no`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='促销使用记录表';