fix chunk.ModifiedTsNs (#4264)

* fix

* fix mtime s > ns

---------

Co-authored-by: zemul <zhouzemiao@ihuman.com>

weed/server/filer_grpc_server_remote.go

@@ -154,10 +154,11 @@ func (fs *FilerServer) CacheRemoteObjectToLocalCluster(ctx context.Context, req
 			}
 
 			chunks = append(chunks, &filer_pb.FileChunk{
+
 				FileId:       assignResult.Fid,
 				Offset:       localOffset,
 				Size:         uint64(size),
-				ModifiedTsNs: time.Now().Unix(),
+				ModifiedTsNs: time.Now().UnixNano(),
 				ETag:         etag,
 				Fid: &filer_pb.FileId{
 					VolumeId: uint32(fileId.VolumeId),

weed/shell/command_volume_fsck.go

@@ -163,6 +163,7 @@ func (c *commandVolumeFsck) Do(args []string, commandEnv *CommandEnv, writer io.
 
 	if *c.findMissingChunksInFiler {
 		// collect all filer file ids and paths
+
 		if err = c.collectFilerFileIdAndPaths(dataNodeVolumeIdToVInfo, *purgeAbsent, collectCutoffFromAtNs); err != nil {
 			return fmt.Errorf("collectFilerFileIdAndPaths: %v", err)
 		}