Test

fix: `obsm` + dense chunks #109

Job	Run time
get-environments	11s
hatch-test.py3.11-minimal	1m 24s
hatch-test.py3.13-pre (PRE-RELEASE DEPENDENCIES)	1m 22s
hatch-test.py3.13-minimal	1m 28s
hatch-test.py3.13-torch	2m 3s
Tests pass in all hatch environments	4s
	6m 32s

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