By Andreas Rinke and Sarah Marsh BERLIN (Reuters) -German Chancellor Olaf Scholz on Sunday warned Russia of immediate sanctions and “hard reactions” if it attacks Ukraine, maintaining a tough tone ahead of a meeting this week with Russian President Vladimir Putin. Scholz travels to Kyiv on Monday to meet Ukrainian President Volodymyr Zelenskiy and to Moscow on Tuesday to meet Putin as part of diplomatic efforts to ease tensions. Both trips will be to sound out how to secure peace, which faces a “very, very serious threat,” Scholz said, calling on Russia to de-escalate. “Military agreession aga…