No lives were lost in the huge fire that gutted a storage building on the Brooklyn waterfront over the weekend. But the flames put plenty of lives on display as the crumpling warehouse belched up its contents: decades’ worth of charred medical records, court transcripts, lawyers’ letters, sonograms, bank checks and more. “They’re like treasure maps, but with people’s personal information all over them,” Spencer Bergen, 24, said of the half-charred scraps that he said he had seen strewn around the Williamsburg neighborhood as far inland as Berry Street, several blocks from the warehouse.;