Fix flaky LangGraph timeout tests (#1495) #700

Job	Run time
compile-binaries (macos-arm, macos-aarch64, macos-14)	11m 19s
compile-binaries (ubuntu-arm, linux-aarch64, ubuntu-24.04-arm64-2-core)	9m 51s
compile-binaries (ubuntu-latest, linux-amd64)	8m 8s
compile-binaries (windows-latest, windows-amd64)	11m 52s
compile-binaries (macos-intel, macos-amd64, macos-15-intel)	13m 57s
	55m 7s

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