fix: improve error handling for codebase search embeddings #8760

Job	Run time
knip	29s
compile	1m 37s
check-translations	30s
platform-unit-test (ubuntu-latest)	5m 11s
platform-unit-test (windows-latest)	5m 15s
check-openrouter-api-key	1s
integration-test	2m 4s
	15m 7s

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