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-admin/src/main/resources/application-prod.yml

@@ -1,3 +1,4 @@
+
 --- # 监控中心配置
 spring.boot.admin.client:
   # 增加客户端开关
@@ -58,7 +59,7 @@ spring:
           driverClassName: com.mysql.cj.jdbc.Driver
           # jdbc 所有参数配置参考 https://lionli.blog.csdn.net/article/details/122018562
           # rewriteBatchedStatements=true 批处理优化 大幅提升批量插入更新删除性能(对数据库有性能损耗 使用批量操作应考虑性能问题)
-          url: jdbc:mysql://127.0.0.1:3306/ruoyi-ai-agent?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8&autoReconnect=true&rewriteBatchedStatements=true&allowPublicKeyRetrieval=true&nullCatalogMeansCurrent=true
+          url: jdbc:mysql://127.0.0.1:3306/ruoyi-ai?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8&autoReconnect=true&rewriteBatchedStatements=true&allowPublicKeyRetrieval=true&nullCatalogMeansCurrent=true
           username: root
           password: root
 #        agent: