Turkey hopes Russia will not take a negative stance during talks to revive a 2015 Iran nuclear deal after a last-minute demand by Moscow forced talks to pause, Foreign Minister Mevlut Cavusoglu said on Sunday. Negotiators have reached the final stages of discussions to restore the deal, which lifted sanctions on Iran in return for curbs on its nuclear programme, long seen by the West as a cover for developing atomic bombs. But Russian demands of guarantees to protect its trade with Iran after it was hit with a slew of sanctions over its invasion of Ukraine risked a collapse of talks. Speaking …