/**
 * 更新文件DTO
 */
export declare class UpdateFileDto {
    originalName?: string;
    filename?: string;
    metadata?: Record<string, unknown>;
    path?: string;
    checksum?: string;
    status?: 'processing' | 'completed' | 'failed' | 'deleted';
    errorMessage?: string;
    fileType?: string;
    extension?: string;
    validationData?: Record<string, unknown>;
}