Function validateRawArticle

Returns {
    article_billReference: string;
    article_category_id?: number;
    article_code?: string;
    article_comment?: string;
    article_eanCode?: string;
    article_gross_sellingPrice?: string;
    article_id?: string;
    article_minStock: string;
    article_name: string;
    article_negativeStock?: boolean;
    article_net_purchacePrice?: string;
    article_net_sellingPrice?: string;
    article_stock?: string;
    article_stockStatus?: number;
    article_taxRate?: string;
    article_unit?: string;
}