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Include diagnostics in failed SARIF if they were created before a database was initialised #11361

Job	Run time
Split workflow (ubuntu-latest, nightly-latest)	1m 6s
Split workflow (ubuntu-latest, default)	1m 9s
Split workflow (macos-latest, nightly-latest)	2m 25s
Split workflow (ubuntu-latest, linked)	1m 13s
Split workflow (macos-latest, linked)	2m 9s
Split workflow (macos-latest, default)	1m 55s
	9m 57s