tests

fix: forbid PatchOp with zero or missing operations #450

Job	Run time
py3.9 unit tests	11s
py3.11 unit tests	10s
py3.12 unit tests	13s
minimum dependency versions	12s
py unit tests	15s
style	18s
py3.13 unit tests	12s
doc	13s
py3.10 unit tests	11s
py3.12 scim2-server downstream unit tests	9s
py3.13 scim2-tester downstream unit tests	25s
py3.11 scim2-tester downstream unit tests	28s
py3.13 scim2-client downstream unit tests	15s
py3.13 scim2-cli downstream unit tests	20s
py3.12 scim2-client downstream unit tests	17s
py3.12 scim2-cli downstream unit tests	21s
py3.11 scim2-server downstream unit tests	7s
py3.11 scim2-cli downstream unit tests	19s
py3.11 scim2-client downstream unit tests	18s
py3.12 scim2-tester downstream unit tests	25s
py3.13 scim2-server downstream unit tests	11s
	5m 30s

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