[AI-72] LangGraph plugin samples #1122

Job	Run time
build-lint-test (3.10, macos-arm)	1m 59s
build-lint-test (3.14, macos-intel)	2m 7s
build-lint-test (3.14, macos-arm)	1m 59s
build-lint-test (3.10, windows-latest)	1m 35s
build-lint-test (3.14, ubuntu-latest)	1m 17s
build-lint-test (3.10, macos-intel)	2m 2s
build-lint-test (3.14, windows-latest)	1m 13s
build-lint-test (3.10, ubuntu-latest)	1m 1s
	13m 13s

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