handle property validation on flat objects #577

Job	Run time
linting	53s
test-and-coverage / ubuntu-latest / python-3.8	1m 32s
documentation / script inventory	5s
test-and-coverage / ubuntu-latest / python-3.9	1m 31s
e2e tests local	7m 16s
test-and-coverage / ubuntu-latest / python-3.10	1m 31s
e2e tests dist	20m 8s
test-and-coverage / ubuntu-latest / python-3.11	1m 12s
test-and-coverage / windows-latest / python-3.11	4m 3s
documentation / script/docs-generate-changelog.py	37s
documentation / script/docs-generate-licenses.py	36s
documentation / script/docs-generate.bash	56s
documentation / build	2m 54s
releasable	2s
	43m 16s

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