[Fix_#3384] Including business key on process instance state event (#…

…3385)

api/kogito-events-core/src/main/java/org/kie/kogito/event/impl/ProcessInstanceEventBatch.java

@@ -309,6 +309,7 @@ private ProcessInstanceStateDataEvent toProcessInstanceStateEvent(ProcessEvent e
                 .rootProcessId(pi.getRootProcessId())
                 .rootProcessInstanceId(pi.getRootProcessInstanceId())
                 .state(event.getProcessInstance().getState())
+                .businessKey(pi.getBusinessKey())
                 .slaDueDate(pi.getSlaDueDate());
 
         String securityRoles = (String) event.getProcessInstance().getProcess().getMetaData().get("securityRoles");