CREATE TABLE IF NOT EXISTS `email_send_log` (
  `id` BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键ID',
  `email` VARCHAR(255) NOT NULL COMMENT '邮箱地址',
  `status` TINYINT NOT NULL DEFAULT 0 COMMENT '状态: 0=已发送未注册, 1=已注册',
  `created_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `updated_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`),
  INDEX `idx_email` (`email`),
  INDEX `idx_status` (`status`),
  INDEX `idx_created_at` (`created_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='邮件发送记录表';