Test

✅ Refactor tests, consolidate into a single test file for multiple variants #2504

Job	Run time
test (ubuntu-latest, 3.8, pydantic-v1)	34s
test (ubuntu-latest, 3.8, pydantic-v2)	31s
test (ubuntu-latest, 3.10, pydantic-v1)	34s
test (ubuntu-latest, 3.11, pydantic-v1)	34s
test (ubuntu-latest, 3.10, pydantic-v2)	20s
test (ubuntu-latest, 3.13, pydantic-v1)	39s
test (ubuntu-latest, 3.9, pydantic-v2)	25s
test (ubuntu-latest, 3.9, pydantic-v1)	33s
test (ubuntu-latest, 3.11, pydantic-v2)	24s
test (ubuntu-latest, 3.13, pydantic-v2)	1m 10s
test (ubuntu-latest, 3.12, pydantic-v1)	34s
test (ubuntu-latest, 3.12, pydantic-v2)	1m 7s
coverage-combine	-1s
alls-green	3s
	7m 27s

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