如何设计一个可扩展的MySQL表结构来实现商品管理功能？

CREATE TABLE `product` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(100) NOT NULL,
  `price` DECIMAL(10, 2) NOT NULL,
  `stock` INT(11) NOT NULL,
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE `cateGory` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(100) NOT NULL,
  `parent_id` INT(11) DEFAULT NULL,
  PRIMARY KEY (`id`),
  FOREIGN KEY (`parent_id`) REFERENCES `category`(`id`) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE `product_attribute` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `product_id` INT(11) NOT NULL,
  `name` VARCHAR(100) NOT NULL,
  `value` VARCHAR(255) NOT NULL,
  PRIMARY KEY (`id`),
  FOREIGN KEY (`product_id`) REFERENCES `product`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE `product_image` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `product_id` INT(11) NOT NULL,
  `url` VARCHAR(255) NOT NULL,
  `is_default` TINYINT(1) NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`),
  FOREIGN KEY (`product_id`) REFERENCES `product`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;