Increase resolution of train_test_split

[0x2b3bfa0]

• Split Dataset into train/test/val #604 (comment)

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[dreadatour]

Looks good to me, thank you for the fix.
Need to deal with tests now and to be careful with different DB implementations as you've mentioned.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.04%. Comparing base (21857af) to head (b5d97ef).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #611   +/-   ##
=======================================
  Coverage   88.04%   88.04%           
=======================================
  Files         102      102           
  Lines       10085    10086    +1     
  Branches     1373     1373           
=======================================
+ Hits         8879     8880    +1     
  Misses        865      865           
  Partials      341      341           

Flag	Coverage Δ
datachain	87.98% <100.00%> (+<0.01%)	⬆️

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