start backend

src/main/java/com/krylov/refound/entity/Message.java

@@ -0,0 +1,35 @@
+package com.krylov.refound.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import java.time.LocalDateTime;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Table(name = "messages")
+@Getter
+@Setter
+public class Message {
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  @ManyToOne
+  private User sender;
+
+  @ManyToOne
+  private User receiver;
+
+  @Column(length = 2000)
+  private String content;
+
+  private LocalDateTime createdAt;
+
+  private boolean isRead;
+}