使用异步处理优化DXF 转 GeoJSON接口响应速度；修改部分逻辑，添加删除功能相关校验

RuoYi-Vue-Plus/ruoyi-admin/src/main/java/org/dromara/DromaraApplication.java

@@ -3,13 +3,14 @@ package org.dromara;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.context.metrics.buffering.BufferingApplicationStartup;
+import org.springframework.scheduling.annotation.EnableAsync;
 
 /**
  * 启动程序
  *
  * @author Lion Li
  */
-
+@EnableAsync
 @SpringBootApplication
 public class DromaraApplication {