Add logging

src/main/java/nl/connectedit/swiss/service/TournamentDivideService.java

@@ -9,6 +9,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.java.Log;
 import nl.connectedit.swiss.domain.EventType;
 import nl.connectedit.swiss.domain.Status;
 import nl.connectedit.swiss.domain.TournamentStatus;
@@ -22,6 +23,7 @@ import org.springframework.stereotype.Service;
 
 @Service
 @RequiredArgsConstructor
+@Log
 public class TournamentDivideService {
 
   private final TournamentValidationService tournamentValidationService;
@@ -54,7 +56,7 @@ public class TournamentDivideService {
       registrations = groupRegistrations(event.getRegistrations());
     } else {
       registrations = event.getRegistrations();
-      System.out.printf("Aantal registrations: %d", registrations.size());
+      log.info("Aantal registrations: %s".formatted(registrations.size()));
     }
 
     event.setGroups(new ArrayList<>());