fix: DIA-1562: false precision in cost reports

[robot-ci-heartex]

Hi @robot-ci-heartex!

This PR was automaticaly generated via Follow Merge. Please ensure that all linked upstream Pull Requests are merged before proceeding with this one.

• https://github.com/HumanSignal/label-studio-sdk/pull/347 linked by Workflow Run
• https://github.com/HumanSignal/label-studio-sdk/pull/349 linked by Workflow Run

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 65.70%. Comparing base (3665a80) to head (567b176).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #239   +/-   ##
=======================================
  Coverage   65.70%   65.70%           
=======================================
  Files          47       47           
  Lines        2391     2391           
=======================================
  Hits         1571     1571           
  Misses        820      820           

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