tests

chore: improve CheckResult repr #203

Job	Run time
py unit tests	40s
py3.10 unit tests	32s
py3.13 unit tests	25s
py3.12 unit tests	25s
minimum dependency versions	33s
py3.11 unit tests	27s
py3.13 scim2-cli downstream unit tests	16s
py3.12 scim2-cli downstream unit tests	17s
doc	10s
py3.11 scim2-cli downstream unit tests	17s
style	14s
	4m 16s

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