Iraqi authorities on Saturday were investigating the killing of a well-known social media influencer, who was shot by an armed motorcyclist in front of her home in central Baghdad. Ghufran Mahdi Sawadi, known as “Um Fahad” was popular on the social media sites TikTok and Instagram, where she posted videos of herself dancing to music and was followed by tens of thousands of users. An Iraqi security official, who spoke on the condition of anonymity because he wasn’t authorized to speak to the media, said that the assailant opened fire as Sawadi parked her Cadillac in front of her house on Friday…