BONDI, AUSTRALIA — In the days after the terror attack at Bondi Beach, as flowers piled up outside the Pavilion and the names of the dead were still being spoken aloud for the first time, Australia’s Governor-General found herself returning to a single question. “What does a nation look like,” Sam Mostyn asked, “when ordinary people are confronted with something they never imagined they would face?” Her Excellency the Honourable Sam Mostyn AC, The King’s representative in Australia, has spent