Add Post module

src/main/java/com/openisle/model/Post.java

@@ -0,0 +1,40 @@
+package com.openisle.model;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@Table(name = "posts")
+public class Post {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    private String title;
+
+    @Column(nullable = false, columnDefinition = "TEXT")
+    private String content;
+
+    @Column(nullable = false)
+    private LocalDateTime createdAt;
+
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "author_id")
+    private User author;
+
+    @Column(nullable = false)
+    private long views = 0;
+
+    @PrePersist
+    protected void onCreate() {
+        this.createdAt = LocalDateTime.now();
+    }
+}