added database for bill intitate and bill payment and removed the polling logic

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

@@ -0,0 +1,21 @@
+package com.billpaymentservice.bbps.entites;
+import jakarta.persistence.*;
+import lombok.*;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Entity
+@Table(name = "bill_initiate")
+public class BillInitiate {
+	    @Id
+	    @Column(name = "req_id")
+	    private String reqId;
+	    
+        @Column(name = "bill_id", nullable = false)
+        private String billId;
+        
+        @Column(name = "txn_id")
+        private String txnId;
+   
+}