A Syrian girl is among the residents in an apartment building where foreign workers have tested positive for the coronavirus. Long before the pandemic in Lebanon, they lived and worked in conditions that rights groups called exploitative — low wages, long hours, no labor law protections. Now, about 250,000 registered migrant laborers in the country — maids, garbage collectors, and farm and construction workers — are growing more desperate as an economic and financial crisis sets in, coupled with coronavirus restrictions.