By Martin Coulter, Supantha Mukherjee and Foo Yun Chee LONDON (Reuters) -The European Union’s landmark Artificial Intelligence (AI) Act may exempt open-source models from strict regulation, according to a leaked compromise proposal seen by Reuters. Lawmakers halted negotiations on Thursday, after almost 24 hours of overnight negotiations failed to reach a consensus on how best to regulate the rapidly-developing technology. Open-source refers to the free and open sharing of software code, allowing anyone to contribute to upgrading it or resolving bugs. Notable European companies operating in th…