Improve logging for ConnectionPersistenceActor

Signed-off-by: Yannic Klem <yannic.klem@bosch.io>

connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/messaging/persistence/ConnectionPersistenceActor.java

@@ -399,9 +399,13 @@ protected void recoveryCompleted(final RecoveryCompleted event) {
     @Override
     protected ConnectivityEvent<?> modifyEventBeforePersist(final ConnectivityEvent<?> event) {
         final ConnectivityEvent<?> superEvent = super.modifyEventBeforePersist(event);
+        final Set<String> tags = journalTags(event);
         final DittoHeaders headersWithJournalTags = superEvent.getDittoHeaders().toBuilder()
-                .journalTags(journalTags(event))
+                .journalTags(tags)
                 .build();
+        log.withCorrelationId(event)
+                .info("Appending the following tags to event of type <{}> for connection with ID <{}>: <{}>",
+                        event.getType(), event.getEntityId(), tags);
         return superEvent.setDittoHeaders(headersWithJournalTags);
     }