TEL AVIV — The stopwatch that has haunted a square in Tel Aviv by counting every fretful second since Hamas kidnapped 251 Israelis on Oct. 7, 2023, was shut off Tuesday night in a solemn ceremony attended by hundreds of people. After 843 days and 12 hours, Israelis in "Hostages Square" marked the end of a crisis, opening a new chapter in a shaky ceasefire between the Israeli military and Hamas militants that has managed to endure for nearly four months. “We are here on a day we prayed for since