Adds Statifier.active_leaf_states

[johnnyt]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
lib/statifier.ex	0.00%	1 Missing ⚠️

❌ Your patch status has failed because the patch coverage (0.00%) is below the target coverage (50.00%). You can increase the patch coverage or adjust the target coverage.

Files with missing lines	Coverage Δ
lib/statifier.ex	93.33% <0.00%> (-6.67%)	⬇️

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