fix: query res freed when fetch handling drop event

source/libs/qworker/src/qworker.c

@@ -517,7 +517,7 @@ int32_t qwHandlePostPhaseEvents(QW_FPARAMS_DEF, int8_t phase, SQWPhaseInput *inp
   }
 
   if (QW_EVENT_RECEIVED(ctx, QW_EVENT_DROP)) {
-    if (QW_PHASE_POST_FETCH != phase || qwTaskNotInExec(ctx)) {
+    if (QW_PHASE_POST_FETCH != phase || ((!QW_QUERY_RUNNING(ctx)) && qwTaskNotInExec(ctx))) {
       QW_ERR_JRET(qwDropTask(QW_FPARAMS()));
       QW_ERR_JRET(ctx->rspCode);
     }