Preferred call changes

src/main/java/net/gepafin/tendermanagement/model/response/CallDetailsResponseBean.java

@@ -53,5 +53,6 @@ public class CallDetailsResponseBean {
     private LocalDateTime createdDate;
 
     private LocalDateTime updatedDate;
-    private Boolean preferred;
+
+    private Long preferredCallId;
 }

src/main/java/net/gepafin/tendermanagement/model/response/CallResponse.java

@@ -73,6 +73,7 @@ public class CallResponse {
     
     private String currentStep;
 
+    private Long preferredCallId;
 }