CREATE TABLE IF NOT EXISTS `deal_files` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `deal_id` INT NOT NULL,
  `original_filename` VARCHAR(255) NOT NULL,
  `stored_filename` VARCHAR(255) NOT NULL,
  `file_type` VARCHAR(100) NOT NULL,
  `file_size` INT NOT NULL,
  `uploaded_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (`deal_id`) REFERENCES `deals`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;