tests

chore: add coverage and dowstream tests to GHA #196

Job	Run time
minimum dependency versions	29s
py3.10 unit tests	29s
py unit tests	8s
py3.12 unit tests	26s
doc	11s
py3.13 unit tests	25s
py3.13 scim2-cli downstream unit tests	16s
py3.11 unit tests	26s
py3.11 scim2-cli downstream unit tests	18s
py3.12 scim2-cli downstream unit tests	16s
style	13s
	3m 37s

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