BRUNSWICK — Loggerhead sea turtles have crawled their way to a conservation milestone in Georgia.As of two weeks ago, the hard-shell giants with log-sized heads had laid more than 2,810 nests on the state’s barrier island beaches this nesting season, according to the Georgia Department of Natural Resources. A key recovery goal for loggerheads, listed as threatened under the Endangered Species Act, is 2,800 nests annually in Georgia. And while sea turtle nesting winds down in mid-July, it’s far from over.