added db optimization for the get master data and get billerdetails

src/main/java/com/billpaymentservice/bbps/dto/AmountOptionDTO.java

@@ -3,9 +3,11 @@ import java.util.List;
 
 import lombok.Getter;
 import lombok.Setter;
+import lombok.ToString;
 
 @Getter
 @Setter
+@ToString
 public class AmountOptionDTO{
    private String amountOptionId;            // Matches "amountOptionId" from JSON
     private List<String> amountBreakupSets;              // Reference to BillerResponseParams (only ID, not full entity)