fix: Circular inclusion

src/main/java/com/maradona/backend/entities/Employee.java

@@ -2,6 +2,7 @@ package com.maradona.backend.entities;
 
 import jakarta.persistence.*;
 import lombok.Data;
+import com.fasterxml.jackson.annotation.JsonManagedReference;
 import java.time.LocalTime;
 import java.util.List;
 import java.util.Map;
@@ -10,7 +11,6 @@ import java.util.stream.Collectors;
 @Entity
 @Data
 public class Employee {
-
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
@@ -31,6 +31,7 @@ public class Employee {
     private LocalTime dEnd;
 
     @OneToMany(mappedBy = "employee", cascade = CascadeType.ALL, orphanRemoval = true)
+    @JsonManagedReference
     private List<EmployeeSecondarySkill> secondarySkills;
 
     public void setEmployeeNr(Integer employeeNr) {

src/main/java/com/maradona/backend/entities/EmployeeSecondarySkill.java

@@ -1,13 +1,12 @@
 package com.maradona.backend.entities;
 
 import jakarta.persistence.*;
-import com.fasterxml.jackson.annotation.JsonBackReference;
 import lombok.Data;
+import com.fasterxml.jackson.annotation.JsonBackReference;
 
 @Entity
 @Data
 public class EmployeeSecondarySkill {
-
   @Id
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   private Long id;
@@ -19,7 +18,6 @@ public class EmployeeSecondarySkill {
 
   @ManyToOne
   @JoinColumn(name = "secondary_skill_id", nullable = false)
-  @JsonBackReference
   private SecondarySkill secondarySkill;
 
   @Column(nullable = false)