feat: Update OpenAI graph runner to return AgentGraphRunnerResult with GraphMetrics #628

Job	Run time
server-ai-linux (3.10)	16s
server-ai-windows (3.11)	21s
server-ai-langchain-windows (3.11)	31s
server-ai-langchain-windows (3.12)	23s
server-ai-windows (3.12)	23s
server-ai-linux (3.11)	20s
server-ai-openai-linux (3.12)	29s
server-ai-langchain-windows (3.13)	22s
server-ai-linux (3.14)	17s
server-ai-langchain-windows (3.10)	23s
server-ai-openai-linux (3.13)	30s
server-ai-windows (3.14)	40s
server-ai-openai-linux (3.10)	29s
server-ai-linux (3.13)	16s
server-ai-langchain-linux (3.12)	23s
server-ai-windows (3.10)	34s
server-ai-langchain-windows (3.14)	24s
server-ai-openai-windows (3.10)	30s
server-ai-openai-windows (3.11)	32s
server-ai-optimization-linux (3.12)	13s
server-ai-openai-linux (3.14)	27s
server-ai-openai-windows (3.13)	48s
server-ai-openai-linux (3.11)	28s
server-ai-langchain-linux (3.11)	21s
server-ai-langchain-linux (3.10)	20s
server-ai-linux (3.12)	19s
server-ai-openai-windows (3.12)	24s
server-ai-optimization-linux (3.14)	12s
server-ai-optimization-linux (3.13)	16s
server-ai-optimization-windows (3.13)	23s
server-ai-langchain-linux (3.13)	22s
server-ai-optimization-linux (3.11)	12s
server-ai-optimization-windows (3.11)	27s
server-ai-openai-windows (3.14)	26s
server-ai-optimization-linux (3.10)	11s
server-ai-optimization-windows (3.14)	25s
server-ai-windows (3.13)	59s
server-ai-optimization-windows (3.12)	1m 23s
server-ai-langchain-linux (3.14)	24s
server-ai-optimization-windows (3.10)	38s
	17m 41s

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