Test

Add unit tests for tl._stats module #18

Job	Run time
get-environments	10s
hatch-test.py3.14-pre (PRE-RELEASE DEPENDENCIES)	1m 37s
hatch-test.py3.11-stable	3m 14s
hatch-test.py3.14-stable	2m 45s
Tests pass in all hatch environments	2s
	7m 48s

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