Police in San Francisco arrested a suspect on Thursday morning over last week’s stabbing death of Cash App creator and fintech pioneer Bob Lee , authorities said.  San Francisco Police Chief Bill Scott told reporters at an afternoon news conference that Nima Momeni, 38, was arrested at his home in Emeryville, a suburb between Oakland and Berkeley. Lee and Momeni, the owner of the technology company Expand IT, knew one another, the police chief said. “Our investigators have been working tirelessly to make this arrest and bring this case to justice for the Lee family, just as we would for every homicide that occurs in this city,” Scott said.…