feat: Introduce ManagedAgent and AgentRunner implementations #408

Job	Run time
server-ai-linux (3.13)	17s
server-ai-linux (3.12)	14s
server-ai-langchain-linux (3.12)	20s
server-ai-openai-windows (3.13)	28s
server-ai-langchain-linux (3.11)	18s
server-ai-linux (3.11)	20s
server-ai-openai-windows (3.12)	27s
server-ai-langchain-linux (3.13)	23s
server-ai-openai-windows (3.10)	22s
server-ai-linux (3.10)	15s
server-ai-langchain-linux (3.10)	21s
server-ai-windows (3.12)	18s
server-ai-openai-linux (3.13)	19s
server-ai-openai-linux (3.10)	18s
server-ai-langchain-windows (3.10)	32s
server-ai-openai-linux (3.11)	18s
server-ai-optimization-windows (3.12)	43s
server-ai-optimization-linux (3.10)	15s
server-ai-langchain-windows (3.12)	22s
server-ai-optimization-linux (3.11)	16s
server-ai-windows (3.10)	19s
server-ai-langchain-windows (3.11)	29s
server-ai-optimization-windows (3.10)	24s
server-ai-optimization-linux (3.13)	14s
server-ai-windows (3.13)	22s
server-ai-optimization-windows (3.11)	22s
server-ai-optimization-linux (3.12)	13s
server-ai-windows (3.11)	31s
server-ai-openai-linux (3.12)	18s
server-ai-openai-windows (3.11)	31s
server-ai-optimization-windows (3.13)	20s
server-ai-langchain-windows (3.13)	41s
	11m 50s

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