Fix request saving

src/main/java/nl/tudelft/queue/service/RequestService.java

@@ -155,6 +155,7 @@ public class RequestService {
 		var event = rer.applyAndSave(new RequestTakenEvent(request, assistant.getId()));
 		if (request.getEventInfo().getFirstProcessedAt() == null) {
 			request.getEventInfo().setFirstProcessedAt(LocalDateTime.now());
+			rr.save(request);
 		}
 		qps.notifyAssistantComing(request, assistant);
 		wss.sendRequestTaken(event);