More than 74 migrant men have been living in a cramped basement below a furniture store in South Richmond Hill, Queens — where beds are so in-demand that only half can sleep there at one time, city officials said Tuesday. Fire prevention inspectors discovered the illegal subterranean boarding house Monday when they were called to 132-03 Liberty Ave. to investigate reports about a large collection of e-bike batteries, according to the FDNY. That’s when they found 40 migrants sleeping in the building’s basement — and realized that the true number of inhabitants was actually twice that. “A further probe revealed...