dev add violation notion

src/main/java/ru/soune/nocopy/entity/payment/PaymentMethod.java

@@ -0,0 +1,45 @@
+package ru.soune.nocopy.entity.payment;
+
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import ru.soune.nocopy.entity.user.User;
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "payment_methods")
+@Getter @Setter @NoArgsConstructor @AllArgsConstructor
+public class PaymentMethod {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+
+    @Column(name = "payment_method_id", nullable = false, unique = true)
+    private String paymentMethodId;
+
+    @Column(name = "last_four")
+    private String lastFour;
+
+    @Column(name = "card_type")
+    private String cardType;
+
+    @Column(name = "expiry_month")
+    private String expiryMonth;
+
+    @Column(name = "expiry_year")
+    private String expiryYear;
+
+    @Column(name = "active")
+    private boolean active = true;
+
+    @Column(name = "created_at")
+    private LocalDateTime createdAt;
+}