Datatype validator fix #3569

Job	Run time
pre-commit	38s
jsonschema	0s
core / Load tox environments	4s
core / Python 3.13 coverage	2m 24s
core / Python 3.12 coverage	2m 29s
core / Python 3.11 coverage	1m 50s
core / Python 3.10 coverage	2m 2s
core / Python 3.9 coverage	2m 13s
asdf-schemas / Load tox environments	4s
compatibility / Load tox environments	7s
oldest / Load tox environments	7s
dev / Load tox environments	5s
test / Load tox environments	8s
dev / py310-devdeps-parallel (ubuntu-latest)	1m 44s
dev / py311-devdeps-parallel (ubuntu-latest)	1m 22s
dev / py312-devdeps-parallel (ubuntu-latest)	1m 23s
dev / py313-devdeps-parallel (ubuntu-latest)	1m 17s
dev / py311-pytestdev-parallel (ubuntu-latest)	56s
asdf-schemas / asdf-standard (ubuntu-latest)	41s
asdf-schemas / asdf-transform-schemas (ubuntu-latest)	1m 33s
oldest / py39-oldestdeps-parallel (ubuntu-latest)	1m 3s
compatibility / compatibility (ubuntu-latest)	3m 19s
test / py311-parallel (macos-latest)	1m 4s
test / py311-parallel (windows-latest)	2m 29s
	29m 2s

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