After several hours of debate, the Oakland City Council voted Tuesday to renew its contract with ShotSpotter, a gunshot detection technology system. The council renewed the $2.5 million contract for one year to start, instead of three, because of concerns about a lack of data and the city’s strained budget. But if the City Council does not make changes to the contract next year, it will automatically renew for the full three years.  It was approved by a 7-1 vote,…