fix: allow disabling codebase indexing without workspace #13262

Job	Run time
platform-unit-test (windows-latest)	6m 24s
platform-unit-test (ubuntu-latest)	3m 31s
compile	2m 35s
check-translations	37s
knip	40s
check-openrouter-api-key	3s
integration-test	7m 45s
notify-slack-on-failure	0s
	21m 35s

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