added initatePayment and checkTxnStatus

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

@@ -0,0 +1,28 @@
+package com.billpaymentservice.bbps.entites;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "remitter_identity")
+public class RemitterIdentity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private Long id;
+
+    @Column(name = "name")
+    private String name;
+
+    @Column(name = "value")
+    private String value;
+
+    // Many remitter identities belong to one bill payment
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "txn_id")
+    private BillPayment billPayment;
+}