PARIS (Reuters) – A French judge has put Vinci Construction Grands Projets, a unit of French construction group Vinci, under formal investigation on Wednesday over accusations it had violated the rights of migrant workers in Qatar, Paris-based human rights group Sherpa said on Wednesday. “We’re pleased with the formal investigation,” said Sandra Cossart, head of Sherpa France. “The judge is sending a strong signal, as it’s the first time that a company is charged on this basis for one of its subsidiaries’ activities abroad.” The move follow a 2019 complaint filed by two NGOs, Paris-based human…