Euro zone government bond yields were steady on Tuesday as easing tensions between Israel and Iran for now calmed fears that their weekend attacks could derail U.S. efforts to broker a peace deal to end the Middle East conflict. Investors were also awaiting the European Central Bank's policy announcement on Thursday, when the ECB is expected to become the first of the biggest central banks to raise rates since the Iran war unleashed an energy crisis and stoked inflationary pressures. [...]