refactor(yudao-module-llm): 恢复文档嵌入逻辑

- 重新启用了对上传文件进行嵌入的逻辑
- 根据文件扩展名决定使用不同的嵌入方法

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

@@ -62,13 +62,13 @@ public class AsyncKnowledgeBase {
 
                     int lastIndex = knowledge.getDocumentName().lastIndexOf(".");
                     if (lastIndex != -1) {
-                        ragHttpService.embedUploadFile(regUploadReqVO);
-//                        String extension = knowledge.getDocumentName().substring(lastIndex + 1).toLowerCase();
-//                        if ("txt".equals(extension)) {
-//                            ragHttpService.embedUploadFile(regUploadReqVO);
-//                        } else {
-//                            knowledgeEmbed(knowledge, knowledge.getKnowledgeBaseId());
-//                        }
+
+                        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());