feat!: narrow AgentGraphRunner.run input from Any to str #672

Job	Run time
server-ai-openai-linux (3.12)	27s
server-ai-langchain-linux (3.11)	20s
server-ai-openai-linux (3.14)	29s
server-ai-linux (3.11)	20s
server-ai-linux (3.10)	16s
server-ai-linux (3.13)	20s
server-ai-langchain-linux (3.12)	22s
server-ai-openai-windows (3.13)	31s
server-ai-openai-windows (3.14)	34s
server-ai-openai-windows (3.10)	16s
server-ai-openai-linux (3.11)	25s
server-ai-linux (3.12)	17s
server-ai-langchain-linux (3.13)	20s
server-ai-langchain-linux (3.14)	21s
server-ai-openai-linux (3.13)	24s
server-ai-langchain-linux (3.10)	21s
server-ai-openai-windows (3.12)	9s
server-ai-windows (3.11)	20s
server-ai-windows (3.13)	29s
server-ai-optimization-windows (3.14)	22s
server-ai-linux (3.14)	16s
server-ai-windows (3.12)	22s
server-ai-langchain-windows (3.12)	25s
server-ai-optimization-windows (3.10)	20s
server-ai-openai-windows (3.11)	24s
server-ai-langchain-windows (3.11)	22s
server-ai-optimization-windows (3.13)	19s
server-ai-langchain-windows (3.10)	29s
server-ai-windows (3.10)	24s
server-ai-optimization-linux (3.10)	15s
server-ai-optimization-linux (3.13)	15s
server-ai-optimization-linux (3.11)	10s
server-ai-optimization-windows (3.11)	21s
server-ai-langchain-windows (3.13)	33s
server-ai-langchain-windows (3.14)	26s
server-ai-optimization-linux (3.12)	15s
server-ai-optimization-windows (3.12)	21s
server-ai-windows (3.14)	21s
server-ai-openai-linux (3.10)	28s
server-ai-optimization-linux (3.14)	16s
	14m 25s

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