Lint

Fix test isolation in Flask app database tests #7375

Job	Run time
build (3.13, ubuntu-latest, pre-push)	3m 19s
build (3.13, ubuntu-latest, pre-commit)	49s
build (3.13, windows-latest, manual)	1m 29s
build (3.13, windows-latest, pre-push)	4m 37s
build (3.13, ubuntu-latest, manual)	53s
build (3.13, windows-latest, pre-commit)	2m 33s
completion-lint	3s
	13m 43s

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