feat: Introduce ManagedAgent and AgentRunner implementations #404

Job	Run time
server-ai-optimization-linux (3.10)	14s
server-ai-optimization-windows (3.10)	19s
server-ai-openai-linux (3.12)	19s
server-ai-optimization-linux (3.11)	10s
server-ai-linux (3.13)	20s
server-ai-openai-linux (3.13)	16s
server-ai-openai-linux (3.10)	15s
server-ai-optimization-windows (3.11)	33s
server-ai-optimization-windows (3.12)	30s
server-ai-windows (3.10)	25s
server-ai-openai-windows (3.11)	27s
server-ai-windows (3.12)	20s
server-ai-optimization-linux (3.13)	16s
server-ai-langchain-windows (3.12)	31s
server-ai-optimization-windows (3.13)	21s
server-ai-langchain-linux (3.10)	21s
server-ai-openai-windows (3.10)	30s
server-ai-langchain-linux (3.13)	20s
server-ai-linux (3.12)	17s
server-ai-optimization-linux (3.12)	13s
server-ai-linux (3.10)	19s
server-ai-linux (3.11)	19s
server-ai-langchain-windows (3.10)	47s
server-ai-openai-windows (3.13)	21s
server-ai-windows (3.11)	20s
server-ai-windows (3.13)	21s
server-ai-openai-windows (3.12)	26s
server-ai-langchain-windows (3.13)	23s
server-ai-langchain-windows (3.11)	35s
server-ai-langchain-linux (3.11)	22s
server-ai-langchain-linux (3.12)	19s
server-ai-openai-linux (3.11)	17s
	11m 46s

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