feat: Graph tracking refactor — ManagedAgentGraph drives tracking for new runner shape #617

Job	Run time
server-ai-openai-windows (3.13)	28s
server-ai-openai-windows (3.14)	40s
server-ai-openai-windows (3.11)	57s
server-ai-openai-windows (3.12)	56s
server-ai-openai-windows (3.10)	36s
server-ai-linux (3.14)	1m 48s
server-ai-openai-linux (3.10)	54s
server-ai-windows (3.11)	1m 45s
server-ai-windows (3.10)	19s
server-ai-linux (3.13)	1m 34s
server-ai-langchain-windows (3.12)	1m 48s
server-ai-optimization-windows (3.10)	1m 43s
server-ai-optimization-windows (3.12)	1m 43s
server-ai-langchain-windows (3.14)	1m 47s
server-ai-langchain-linux (3.13)	1m 42s
server-ai-langchain-windows (3.13)	22s
server-ai-windows (3.12)	1m 41s
server-ai-windows (3.14)	1m 34s
server-ai-langchain-linux (3.14)	1m 36s
server-ai-windows (3.13)	25s
server-ai-langchain-linux (3.10)	24s
server-ai-linux (3.10)	1m 32s
server-ai-openai-linux (3.12)	53s
server-ai-optimization-windows (3.11)	47s
server-ai-linux (3.11)	1m 31s
server-ai-langchain-linux (3.11)	1m 31s
server-ai-optimization-windows (3.13)	1m 43s
server-ai-langchain-windows (3.11)	25s
server-ai-optimization-linux (3.13)	1m 23s
server-ai-langchain-linux (3.12)	22s
server-ai-optimization-linux (3.11)	15s
server-ai-optimization-linux (3.10)	1m 34s
server-ai-openai-linux (3.13)	53s
server-ai-optimization-linux (3.12)	13s
server-ai-langchain-windows (3.10)	29s
server-ai-linux (3.12)	19s
server-ai-openai-linux (3.14)	51s
server-ai-optimization-windows (3.14)	1m 31s
server-ai-openai-linux (3.11)	26s
server-ai-optimization-linux (3.14)	1m 29s
	42m 49s

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