cretaed entities for BillerDetail

src/main/java/com/billpaymentservice/bbps/entites/CustomerParamGroups.java

@@ -0,0 +1,29 @@
+package com.billpaymentservice.bbps.entites;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.List;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "customer_param_groups")
+public class CustomerParamGroups {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "group_container_id")
+    private Long id;
+
+    // 🔗 One set of groups belongs to one biller
+    @OneToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "biller_id")
+    private BillerDetails biller;
+
+    // 🔗 One CustomerParamGroups contains multiple Group objects
+    @OneToMany(mappedBy = "customerParamGroups", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<Group> groups;
+}
+