Fix fatal error being forwarded.

src/main/kotlin/KafkaTopology.kt

@@ -158,7 +158,7 @@ class KafkaTopology(private val settings: SettingsLoader) {
 
     private fun streamOutput(stream: KStream<String, Pair<String?, Report>>) {
         stream
-            .filter { _, value -> value != null }
+            .filter { _, value -> value.second.status != ReportStatus.fatal }
             .mapValues { value -> value.first }
             .to(settings.outputTopic)