feat: add post publish mode with review

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

@@ -5,8 +5,12 @@ import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
 
+
 import java.time.LocalDateTime;
 
+/**
+ * Post entity representing an article posted by a user.
+ */
 @Entity
 @Getter
 @Setter
@@ -37,6 +41,10 @@ public class Post {
     @Column(nullable = false)
     private long views = 0;
 
+    @Enumerated(EnumType.STRING)
+    @Column(nullable = false)
+    private PostStatus status = PostStatus.PUBLISHED;
+
     @PrePersist
     protected void onCreate() {
         this.createdAt = LocalDateTime.now();

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

@@ -0,0 +1,9 @@
+package com.openisle.model;
+
+/**
+ * Status of a post during its lifecycle.
+ */
+public enum PostStatus {
+    PUBLISHED,
+    PENDING
+}

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

@@ -0,0 +1,9 @@
+package com.openisle.model;
+
+/**
+ * Application-wide article publish mode.
+ */
+public enum PublishMode {
+    DIRECT,
+    REVIEW
+}