fix request conflict

run.ts

@@ -551,6 +551,8 @@ class Checker {
       good ? ConnectResult.Good : ConnectResult.CDNBad,
     );
   }
+
+  private requestQueue = new PQueue({ concurrency: 1 });
   async handleRecordResult(recordInfo: DomainRecordInfo, good: ConnectResult) {
     const record = recordInfo.record;
     const status = record.Status;
@@ -565,13 +567,15 @@ class Checker {
           recordInfo,
         )} from ${status} to ${targetStatus}.`,
       );
-      await this.client.request(
-        'SetDomainRecordStatus',
-        {
-          RecordId: record.RecordId,
-          Status: targetStatus,
-        },
-        requestOption,
+      await this.requestQueue.add(() =>
+        this.client.request(
+          'SetDomainRecordStatus',
+          {
+            RecordId: record.RecordId,
+            Status: targetStatus,
+          },
+          requestOption,
+        ),
       );
     }
   }