fix version 1

module/ec/mall/internal/logic/freight/deny_region_fetch.go

@@ -4,6 +4,7 @@ import (
 	"context"
 
 	pb "bsm/full/module/ec/mall/pb"
+	"git.apinb.com/bsm-sdk/core/errcode"
 	"git.apinb.com/bsm-sdk/core/service"
 )
 
@@ -22,7 +23,6 @@ func DenyRegionFetch(ctx context.Context, in *pb.MallFetchRequest) (reply *pb.De
 		in.PageSize = 50
 	}
 
-	// TODO: add your logic code & delete this line.
-
-	return
+	// 该接口尚未实现，显式返回未实现错误，避免调用方误判成功。
+	return nil, errcode.ErrUnimplemented
 }