Add session id to key (otherwise it is not unique ...)

src/main/kotlin/KafkaTopology.kt

@@ -55,7 +55,7 @@ class KafkaTopology(
                     emptyList<IndexReport>()
                 }
             }
-            .map { key, value -> KeyValue("$key-${value?.report?.step}", klaxon.toJsonString(value)) }
+            .map { key, value -> KeyValue("$key-${value.report.step}-${value.metadata.sessionId}", klaxon.toJsonString(value)) }
             .to(settings.outputTopic)
 
         return builder