[fix] : flyway 파일 수정 (#295)

(테이블 이름 변경 payment -> payments)

Author: No-366

backend/src/main/java/com/back/domain/payment/payment/entity/Payment.java

@@ -9,12 +9,14 @@
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
+import jakarta.persistence.Table;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
 @Entity
 @Getter
 @NoArgsConstructor
+@Table(name = "payments")
 public class Payment extends BaseEntity {
 	@Id
 	@Column(name = "payment_id", nullable = false)

backend/src/main/resources/db/migration/V20251231_02__rename_payment_to_payments.sql

@@ -0,0 +1,6 @@
+/* =========================================================
+ * 1. Rename Table: payment → payments
+ *    - Payment 엔티티의 @Table(name="payments")와 일치하도록 테이블명 변경
+ *    - FK 제약 조건은 자동으로 업데이트됨
+ * ========================================================= */
+ALTER TABLE payment RENAME TO payments;