Fix delete every nth

src/main/java/de/scads/privacy/privateroutes/measurement/Measurement.java

@@ -4,8 +4,7 @@ import de.scads.privacy.privateroutes.point.Point;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
-import org.hibernate.annotations.OnDelete;
-import org.hibernate.annotations.OnDeleteAction;
+import lombok.ToString;
 
 import javax.persistence.*;
 
@@ -38,8 +37,7 @@ public class Measurement {
     )
     private Double value;
 
-    @ManyToOne
-    @OnDelete(action = OnDeleteAction.CASCADE)
-    @JoinColumn(name="point_id")
+    @ToString.Exclude
+    @ManyToOne(fetch = FetchType.LAZY)
     private Point point;
 }