fix: Prevent compute metrics for draft datasets

[frascuchon]

Description

Dataset progress and user metrics are not available for draft datasets.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested

Checklist

• I added relevant documentation
• I followed the style guidelines of this project
• I did a self-review of my code
• I made corresponding changes to the documentation
• I confirm My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.26%. Comparing base (b9dac8d) to head (9680d3d).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5624      +/-   ##
===========================================
+ Coverage    91.24%   91.26%   +0.02%     
===========================================
  Files          145      145              
  Lines         6032     6036       +4     
===========================================
+ Hits          5504     5509       +5     
+ Misses         528      527       -1     

Flag	Coverage Δ
argilla-server	91.26% <100.00%> (+0.02%)	⬆️

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