GABRIELLA BORTER SEARCH-and-rescue operations have stretched into a sixth day at the site of an oceanside Florida condominium complex that partially collapsed, although with no survivors found since last week hopes are dim for the 150 people still missing. Miami-Dade County Mayor Daniella Levine Cava told reporters that no bodies had been recovered from the rubble since Monday, keeping the official death toll at 11. What caused a major section of the 40-year-old high-rise to crumble into a heap remains under investigation. Initial attention has focused on structural deficiencies described in a 2018 engineer's report. In April 2021, the condo…