Running unet3d datasize outputs a metadata file that does not contain the number of training files

[jeking3]

The metadata file emitted has:

    "dataset": {
      "data_folder": "data/unet3d/",
      "format": "npz",
      "num_files_train": 168,
      "num_samples_per_file": 1,
      "record_length_bytes": 146600628,
      "record_length_bytes_stdev": 68341808,
      "record_length_bytes_resize": 2097152
    },

However the output said:

2025-10-17 08:01:39|RESULT: Number of training files: 28000

I do not see 28000 in the datasize metadata result file. So there no way to fill in workload.dataset.num_files_train for datagen using the metadata file for automation.