chore: add LangGraph node_metrics isolation regression test (#176) #675

Job	Run time
server-ai-openai-windows (3.13)	37s
server-ai-openai-windows (3.11)	24s
server-ai-langchain-windows (3.11)	24s
server-ai-linux (3.11)	17s
server-ai-langchain-windows (3.14)	22s
server-ai-langchain-windows (3.12)	25s
server-ai-openai-windows (3.14)	28s
server-ai-linux (3.13)	16s
server-ai-windows (3.10)	17s
server-ai-openai-windows (3.10)	25s
server-ai-linux (3.14)	18s
server-ai-langchain-linux (3.13)	24s
server-ai-windows (3.13)	19s
server-ai-langchain-windows (3.10)	34s
server-ai-openai-linux (3.14)	30s
server-ai-openai-linux (3.10)	25s
server-ai-optimization-windows (3.12)	28s
server-ai-linux (3.12)	16s
server-ai-openai-windows (3.12)	23s
server-ai-openai-linux (3.13)	26s
server-ai-langchain-linux (3.14)	23s
server-ai-langchain-linux (3.10)	24s
server-ai-openai-linux (3.12)	30s
server-ai-openai-linux (3.11)	25s
server-ai-windows (3.14)	19s
server-ai-optimization-windows (3.11)	16s
server-ai-langchain-windows (3.13)	22s
server-ai-langchain-linux (3.11)	20s
server-ai-optimization-linux (3.11)	15s
server-ai-optimization-linux (3.10)	14s
server-ai-optimization-windows (3.10)	17s
server-ai-optimization-windows (3.14)	16s
server-ai-optimization-windows (3.13)	22s
server-ai-windows (3.11)	34s
server-ai-windows (3.12)	22s
server-ai-langchain-linux (3.12)	18s
server-ai-optimization-linux (3.12)	11s
server-ai-optimization-linux (3.13)	14s
server-ai-linux (3.10)	15s
server-ai-optimization-linux (3.14)	12s
	14m 27s

Provide feedback