CREATE TABLE IF NOT EXISTS `{{module_prefix}}_registration_certificates` (
  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `number` VARCHAR(120) NOT NULL DEFAULT '',
  `holder` VARCHAR(255) NOT NULL DEFAULT '',
  `product_name` VARCHAR(255) NOT NULL DEFAULT '',
  `risk_class` VARCHAR(4) NOT NULL DEFAULT '',
  `status` VARCHAR(20) NOT NULL DEFAULT 'active',
  `document_id` INT UNSIGNED NULL DEFAULT NULL,
  `scan_url` VARCHAR(500) NOT NULL DEFAULT '',
  `issued_at` INT UNSIGNED NOT NULL DEFAULT 0,
  `valid_until` INT UNSIGNED NOT NULL DEFAULT 0,
  `perpetual` TINYINT(1) NOT NULL DEFAULT 0,
  `note` TEXT NOT NULL,
  `created_at` INT UNSIGNED NOT NULL DEFAULT 0,
  `updated_at` INT UNSIGNED NOT NULL DEFAULT 0,
  PRIMARY KEY (`id`),
  KEY `idx_reg_status` (`status`, `updated_at`),
  KEY `idx_reg_risk` (`risk_class`),
  KEY `idx_reg_document` (`document_id`),
  KEY `idx_reg_number` (`number`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;