fix: Donate历史

backend/src/main/java/com/openisle/model/PostDonateChangeLog.java

@@ -0,0 +1,19 @@
+package com.openisle.model;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@Entity
+@Table(name = "post_donate_change_logs")
+public class PostDonateChangeLog extends PostChangeLog {
+
+  @Column(nullable = false)
+  private int amount;
+}