feat: add utility for reporting data stats

[westonpace]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 70 lines in your changes missing coverage. Please review.

Project coverage is 78.87%. Comparing base (2092808) to head (f9f2c67).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
rust/lance/src/dataset/fragment.rs	0.00%	39 Missing ⚠️
rust/lance/src/dataset/statistics.rs	0.00%	31 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3328      +/-   ##
==========================================
- Coverage   79.01%   78.87%   -0.15%     
==========================================
  Files         246      247       +1     
  Lines       87628    87860     +232     
  Branches    87628    87860     +232     
==========================================
+ Hits        69238    69297      +59     
- Misses      15523    15686     +163     
- Partials     2867     2877      +10     

Flag	Coverage Δ
unittests	78.87% <0.00%> (-0.15%)	⬇️

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