CREATE TABLE IF NOT EXISTS `user_badges` (
    `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
    `userId` UUID NOT NULL,
    `badgeId` INT UNSIGNED NOT NULL,
    `unlockedAt` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,

    PRIMARY KEY (id),
    UNIQUE KEY uq_user_badges_user_badge (userId, badgeId),
    INDEX idx_user_badges_user (userId),

    CONSTRAINT `fk_user_badges_userId` FOREIGN KEY (`userId`) REFERENCES `users` (`id`) ON DELETE CASCADE,
    CONSTRAINT `fk_user_badges_badgeId` FOREIGN KEY (`badgeId`) REFERENCES `badges` (`id`) ON DELETE CASCADE
);