MIAMI — Exactly a week after lobbyists succeeded in derailing Miami-Dade County’s landmark heat safety legislation, a lawmaker filed a bill in Tallahassee to block similar efforts in the future. And not just in Miami-Dade. The latest in a string of preemption edicts from the Republican-controlled Florida Legislature would block any city or county from setting standards to protect workers from the increasing risks of extreme heat. With Florida’s legislative session firmly over the halfway mark, efforts to block heat protections are moving forward in Tallahassee. And another measure, with standa…