refactor(module-llm):优化知识库创建文件方法

- 添加 @Async 注解实现异步处理
- 简化文件嵌入逻辑，暂时注释掉非 txt 文件的处理
-优化代码结构，提高可读性和性能

yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/async/AsyncKnowledgeBase.java

@@ -11,6 +11,7 @@ import cn.iocoder.yudao.module.llm.service.http.vo.KnowledgeRagEmbedReqVO;
 import cn.iocoder.yudao.module.llm.service.http.vo.RegUploadReqVO;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Service;
 
 import javax.annotation.Resource;
@@ -37,6 +38,7 @@ public class AsyncKnowledgeBase {
 
 
     // 向向量知识库创建文件
+    @Async
     public void createKnowledgeBase (List<KnowledgeDocumentsDO> knowledgeList, List<Long> ids) {
         if (!CollectionUtils.isAnyEmpty(ids)) {
             String mes = ragHttpService.ragDocumentsDel(llmBackendProperties.getRagDocumentsDel(), ids);
@@ -60,13 +62,13 @@ public class AsyncKnowledgeBase {
 
                     int lastIndex = knowledge.getDocumentName().lastIndexOf(".");
                     if (lastIndex != -1) {
-
-                        String extension = knowledge.getDocumentName().substring(lastIndex + 1).toLowerCase();
-                        if ("txt".equals(extension)) {
-                            ragHttpService.embedUploadFile(regUploadReqVO);
-                        } else {
-                            knowledgeEmbed(knowledge, knowledge.getKnowledgeBaseId());
-                        }
+                        ragHttpService.embedUploadFile(regUploadReqVO);
+//                        String extension = knowledge.getDocumentName().substring(lastIndex + 1).toLowerCase();
+//                        if ("txt".equals(extension)) {
+//                            ragHttpService.embedUploadFile(regUploadReqVO);
+//                        } else {
+//                            knowledgeEmbed(knowledge, knowledge.getKnowledgeBaseId());
+//                        }
                     }
                 } catch (Exception e) {
                     log.error("the creation of the knowledge base error {}", e.getMessage());