[AI-72] LangGraph plugin samples #1116

Job	Run time
build-lint-test (3.10, windows-latest)	1m 4s
build-lint-test (3.10, ubuntu-latest)	54s
build-lint-test (3.14, macos-arm)	1m 13s
build-lint-test (3.10, macos-intel)	1m 17s
build-lint-test (3.14, macos-intel)	1m 25s
build-lint-test (3.10, macos-arm)	1m 13s
build-lint-test (3.14, ubuntu-latest)	1m 11s
build-lint-test (3.14, windows-latest)	1m 4s
	9m 21s

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