debezium/dbz#2007 add missed logging

Signed-off-by: kmos <kmos@commonhaus.dev>

Author: kmos

debezium-quarkus-parent/debezium-quarkus-engine-parent/runtime/src/main/java/io/quarkus/debezium/engine/DebeziumWithCustomSerialization.java

@@ -96,7 +96,7 @@ protected void close() throws IOException {
 
     private DebeziumEngine<?> getEngine() {
         if (engine == null) {
-            throw new IllegalStateException("");
+            throw new IllegalStateException("Debezium Engine is not running");
         }
         return engine;
     }