moved complain-related changes from develop to feature1

src/main/java/com/billpaymentservice/bbps/dto/request/ViewComplainByIdRequest.java

@@ -0,0 +1,13 @@
+package com.billpaymentservice.bbps.dto.request;
+
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class ViewComplainByIdRequest extends BaseClass {
+
+  @NotBlank(message = "Complain ID cannot be blank")
+  private String complaintId;
+}