feat: Update OpenAI graph runner to return AgentGraphRunnerResult with GraphMetrics #630

Job	Run time
server-ai-openai-linux (3.11)	25s
server-ai-openai-linux (3.12)	30s
server-ai-optimization-linux (3.10)	15s
server-ai-openai-linux (3.14)	30s
server-ai-langchain-windows (3.13)	30s
server-ai-linux (3.12)	18s
server-ai-langchain-windows (3.14)	25s
server-ai-openai-linux (3.10)	30s
server-ai-langchain-windows (3.10)	31s
server-ai-linux (3.11)	16s
server-ai-linux (3.14)	16s
server-ai-linux (3.10)	21s
server-ai-langchain-windows (3.12)	31s
server-ai-linux (3.13)	20s
server-ai-openai-linux (3.13)	26s
server-ai-optimization-linux (3.13)	14s
server-ai-langchain-windows (3.11)	32s
server-ai-optimization-linux (3.12)	13s
server-ai-optimization-linux (3.11)	10s
server-ai-openai-windows (3.12)	36s
server-ai-windows (3.13)	21s
server-ai-optimization-linux (3.14)	15s
server-ai-windows (3.10)	29s
server-ai-openai-windows (3.11)	37s
server-ai-openai-windows (3.14)	25s
server-ai-windows (3.11)	21s
server-ai-windows (3.12)	26s
server-ai-windows (3.14)	33s
server-ai-langchain-linux (3.10)	20s
server-ai-langchain-linux (3.11)	22s
server-ai-openai-windows (3.13)	30s
server-ai-langchain-linux (3.12)	18s
server-ai-openai-windows (3.10)	33s
server-ai-langchain-linux (3.14)	22s
server-ai-optimization-windows (3.12)	19s
server-ai-optimization-windows (3.14)	34s
server-ai-optimization-windows (3.11)	31s
server-ai-optimization-windows (3.10)	20s
server-ai-optimization-windows (3.13)	31s
server-ai-langchain-linux (3.13)	24s
	16m 20s

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