`DONE%` value when downloading a Zarr asset is not correct

[kabilar]

Description

When downloading a single Zarr asset or downloading an entire Dandiset that contains a Zarr asset, I have found that the DONE% value for the Zarr is constantly set as 98% or 99%. Whereas the Summary displays a seemingly more accurate progress (e.g. 1.95% in the screenshot below).

Reproducibility

1. Version: dandi==0.59.1
2. Command to download Zarr asset from Dandiset 000108:

   dandi download https://api.dandiarchive.org/api/assets/a25835b8-2293-4bf3-81f0-fbb3b22196fd/download/
   

Thank you