CREATE TABLE IF NOT EXISTS `employee_biometrics` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `employee_id` INT NOT NULL,
  `credential_id` VARCHAR(255) NOT NULL,
  `public_key` TEXT NOT NULL,
  `counter` BIGINT DEFAULT 0,
  `device_name` VARCHAR(255) DEFAULT NULL,
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  UNIQUE(`credential_id`),
  FOREIGN KEY (`employee_id`) REFERENCES `employee_records`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;