Oh shit it’s the casting mount, not the hinge retaining bolt. That’s 99% certain to be Boeing’s fault, not the airline. They’re going to try to say it was the airline because they opened the door to install the WiFi, but they wouldn’t have touched that bolt.
They’re installed by Spirit who manufacture the airframes, which are then shipped to Seattle for assembly with the wings. No-one will have removed those bolts since manufacture. There no need to touch those bolts for the mechanics to open the door, so the airline opening it to install the WiFi seems like a red herring.