Turkey must keep insisting on justice for slain Riyadh critic Jamal Khashoggi even as ties with Saudi Arabia improve, his Turkish fiancée told AFP in an interview. The grisly 2018 killing of Khashoggi inside the Saudi consulate in Istanbul worsened already rocky relations between the two Sunni regional powers and rivals, Turkey and Saudi Arabia. “I think Turkey must somehow continue its insistence (for justice) even if it improves its relations,” Hatice Cengiz said after attending another hearing in the case at Istanbul’s main court this week. “I don’t think it’s in anyone’s best interest to s…