SPRINGFIELD — Since 2004, police agencies in Illinois have logged the race of people pulled over on traffic stops and the outcome of those stops. Gov. J.B. Pritzker signed a measure last month that removes the sunset on the traffic-stop study.House Bill 1613, now Public Act 101-24, allows the study of potential racial profiling to continue.The data collection initiative became law in 2004 — backed by then-state senator Barack Obama — and was set to end this month. Lawmakers decided they wanted to …