fix: cleanupCtx 在启动时创建，可能在 shutdown 前过期 #262

Job	Run time
build-app (arm64, linux/arm64, ubuntu-24.04-arm)	4m 29s
build-docreader	3m 45s
build-app (amd64, linux/amd64, ubuntu-latest)	5m 12s
build-ui	25s
build-sandbox	23s
merge	14s
	14m 28s

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