[AI-72] LangGraph plugin samples #1121

Job	Run time
build-lint-test (3.14, macos-intel)	1m 14s
build-lint-test (3.14, ubuntu-latest)	1m 10s
build-lint-test (3.10, ubuntu-latest)	54s
build-lint-test (3.14, windows-latest)	1m 0s
build-lint-test (3.10, windows-latest)	1m 3s
build-lint-test (3.14, macos-arm)	2m 2s
build-lint-test (3.10, macos-intel)	1m 12s
build-lint-test (3.10, macos-arm)	1m 11s
	9m 46s

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