feat(复习)：标准思维导图生成与回忆对比

- 新增 review_standard_mind_maps / review_recall_records 数据表
- BuiltinMindMapGenerator：从报告/残片/应用场景规则生成标准导图
- MindMapAiClient 接口 + RemoteAiMindMapClient 预留
- StandardMindMapService：生成/编辑/重新生成/回忆对比
- 对比算法：标题归一化 + Bigram Jaccard 模糊匹配
- ReviewController 新增 6 个端点
- MindMapTreeTool / MindMapNode / CompareResult 工具类
- 完整单元测试（10 个，全部通过）
- 更新 docs/review-module-design.md

src/main/java/com/guo/learningprogresstracker/entity/TaskApplicationEntity.java

@@ -0,0 +1,35 @@
+package com.guo.learningprogresstracker.entity;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+
+import java.io.Serializable;
+
+@TableName(value = "task_applications")
+@Data
+public class TaskApplicationEntity extends BaseEntity implements Serializable {
+
+    @TableId(value = "id", type = IdType.AUTO)
+    private Integer id;
+
+    @TableField(value = "task_num")
+    private String taskNum;
+
+    @TableField(value = "title")
+    private String title;
+
+    @TableField(value = "description")
+    private String description;
+
+    @TableField(value = "resource_url")
+    private String resourceUrl;
+
+    @TableField(value = "status")
+    private String status;
+
+    @TableField(exist = false)
+    private static final long serialVersionUID = 1L;
+}