By Parisa Hafezi DUBAI (Reuters) -Iran’s supreme leader on Monday gave his full backing to security forces confronting protests ignited by the death of Mahsa Amini in custody, comments that could herald a harsher crackdown to quell unrest more than two weeks since she died. In his first remarks addressing the 22-year-old woman’s death after her arrest by morality police over “inappropriate attire”, Ayatollah Ali Khamenei said her death “deeply broke my heart” and called it a “bitter incident” provoked by Iran’s enemies. “The duty of our security forces, including police, is to ensure the safet…