CREATE TABLE IF NOT EXISTS `notifications` (
    `id`         BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
    `user_id`    BIGINT UNSIGNED NOT NULL,
    `type`       VARCHAR(64)     NOT NULL DEFAULT 'info',
    `title`      VARCHAR(255)    NOT NULL,
    `body`       TEXT            NOT NULL,
    `is_read`    TINYINT(1)      NOT NULL DEFAULT 0,
    `created_at` DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (`id`),
    INDEX `idx_notifications_user_id_read` (`user_id`, `is_read`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;