Test

Fix O(n^2) pd.concat in _get_cs_contents (#642) #1496

Job	Run time
get-environments	9s
hatch-test.py3.14-stable	5m 41s
hatch-test.py3.14-pre (PRE-RELEASE DEPENDENCIES)	3m 36s
hatch-test.py3.11-stable	4m 31s
Tests pass in all hatch environments	2s
	13m 59s

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