fix: dataset-metadata private collections call

[ebezzi]

Reviewers

Functional:
@MDunitz @tihuan

[codecov]

Codecov Report

Merging #127 (1e4653a) into main (56d24af) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 1e4653a differs from pull request most recent head c31e5ea. Consider uploading reports for the commit c31e5ea to get more accurate results

@@           Coverage Diff           @@
##             main     #127   +/-   ##
=======================================
  Coverage   71.83%   71.83%           
=======================================
  Files         126      126           
  Lines       10106    10106           
=======================================
  Hits         7260     7260           
  Misses       2846     2846           

Flag	Coverage Δ
frontend	71.83% <100.00%> (ø)
javascript	71.83% <100.00%> (ø)
smokeTest	?
unitTest	71.83% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
server/data_common/dataset_metadata.py	91.66% <100.00%> (ø)

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[MDunitz]

lgtm