Async Sandbox - Run code output handlers are never awaited #223

Job	Run time
build-template / Build E2B Template	9m 7s
charts-tests / Chart Data Extractor - Build and test	28s
performance-tests / Performance tests	1m 40s
js-sdk / JS SDK - Build and test	2m 5s
python-sdk / Python SDK - Build and test	3m 31s
cleanup-build-template / Cleanup Build Template	22s
	17m 13s

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