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chore(importer): add helpers for runtime flags #616

Job	Run time
oldschool (rockylinux, 9, release)	25s
ubuntu (22.04)	24s
oldschool (rockylinux, 9, debug)	24s
ubuntu (24.04)	25s
macOS (latest, 3.9, 5.9.*, release)	25s
macOS (latest, 3.11, 5.12.*, debug)	24s
windows (win64_mingw73, 3.10, 5.12.*, x64)	26s
windows (win64_msvc2019_64, 3.13, x64, 5.15.*, PythonQtCore PythonQtGui PythonQtMultimedia)	30s
windows (win64_msvc2017_64, 3.6, x64, 5.11.*)	30s
windows (win32_mingw53, 3.6, x86, 5.11.*)	27s
macOS (latest, 3.9, 5.9.*, debug)	1s
	4m 21s

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