After eyeing a piece of haddock on the supermarket counter, a customer scans a code and finds out the fish was caught in the waters of Georges Bank and learns the name of the fishing boat – and maybe even sees a picture of the smiling, rain-slickened fisherman who reeled it in. Welcome to the future of buying New England seafood. A group of scientists and fishermen say the technology isn’t about a gimmick so much as survival.