By Stella Qiu and Jamie Freed SHANGHAI/SYDNEY (Reuters) – China’s domestic air traffic, once the world’s envy after a fast rebound during the pandemic, is faltering due to a zero-COVID policy that has led to tighter travel rules in Beijing and weaker consumer confidence after repeated small outbreaks. The outlook for the fourth quarter, normally a popular time for southerners to head north for winter breaks and northerners to head south for warmer weather, is dimming due to COVID-19 related disruptions at a time when international traffic is negligible. “It’s very exhausting that the virus som…