Yet more precautions for invalid data in Steam #781

Job	Run time
check-dev-build	5s
sign-assets / smoke-inflator / build-release / build	1m 30s
sign-assets / test-release / build-debug / build	1m 29s
sign-assets / test-release / test-build	55s
sign-assets / smoke-inflator / smoke-test-inflator	46s
sign-assets / smoke-inflator / notify	0s
sign-assets / test-release / notify	0s
sign-assets / sign	10m 43s
upload-release-s3	9s
upload-deb	32s
upload-inflator	2m 55s
upload-dmg	39s
upload-metadata-tester	1m 14s
upload-rpm	35s
notify-discord / Notify Discord	3s
	21m 35s

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