[AI-72] LangGraph plugin samples #1159

Job	Run time
build-lint-test (3.14, macos-arm)	1m 54s
build-lint-test (3.10, ubuntu-latest)	1m 37s
build-lint-test (3.14, windows-latest)	1m 45s
build-lint-test (3.10, macos-intel)	2m 5s
build-lint-test (3.10, windows-latest)	1m 40s
build-lint-test (3.14, macos-intel)	2m 6s
build-lint-test (3.10, macos-arm)	1m 56s
build-lint-test (3.14, ubuntu-latest)	1m 39s
	14m 42s

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