feat: 增加爬虫案例

src/main/java/com/lanyuanxiaoyao/bookstore/entity/Book.java

@@ -41,6 +41,7 @@ public class Book extends SimpleEntity {
   @Column(nullable = false)
   private String name;
   private String author;
+  @Column(columnDefinition = "text")
   private String description;
   private String source;
   @ElementCollection(fetch = FetchType.EAGER)

src/main/java/com/lanyuanxiaoyao/bookstore/entity/Chapter.java

@@ -40,7 +40,6 @@ import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 public class Chapter extends SimpleEntity {
   @Column(nullable = false)
   private Double sequence;
-  @Column(nullable = false)
   private String name;
   private String description;
 

src/main/java/com/lanyuanxiaoyao/bookstore/service/CrawlerService.java

@@ -0,0 +1,13 @@
+package com.lanyuanxiaoyao.bookstore.service;
+
+import org.springframework.stereotype.Service;
+
+/**
+ * 书籍下载
+ *
+ * @author lanyuanxiaoyao
+ * @version 20251031
+ */
+@Service
+public class CrawlerService {
+}