feat: 发布3.0版本，新增文档处理能力和演示模式

- 升级langchain4j版本至1.13.0
- 新增docx/pdf/xlsx文档处理技能模块
- 添加演示模式配置和切面拦截
- 优化聊天服务和可观测性监听器

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ruoyi-modules/ruoyi-chat/pom.xml

@@ -103,6 +103,21 @@
             <version>${langchain4j.community.version}</version>
         </dependency>
 
+        <!-- LangChain4j Skills - 技能模块 -->
+        <dependency>
+            <groupId>dev.langchain4j</groupId>
+            <artifactId>langchain4j-skills</artifactId>
+            <version>${langchain4j.community.version}</version>
+        </dependency>
+
+
+        <dependency>
+            <groupId>dev.langchain4j</groupId>
+            <artifactId>langchain4j-experimental-skills-shell</artifactId>
+            <version>${langchain4j.community.version}</version>
+        </dependency>
+
+
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>weaviate</artifactId>
@@ -152,6 +167,13 @@
             <artifactId>mysql-connector-j</artifactId>
         </dependency>
 
+        <!-- 测试依赖 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
     </dependencies>
 
 </project>