By Stephanie Nebehay GENEVA (Reuters) – The United Nations’ human rights chief said on Thursday that tens of millions of lives were at risk in Ukraine as the conflict there intensified. Michelle Bachelet called for an immediate halt to hostilities as she opened a debate at the Human Rights Council in Geneva on setting up a commission of inquiry into alleged violations by Russia. “Tens of millions of people remain in the country, in potentially mortal danger. I am deeply concerned that the current escalation of military operations will further heighten the harm they face,” Bachelet said. Emine …