feat: Introduce ManagedAgent and AgentRunner implementations #412

Job	Run time
server-ai-langchain-windows (3.11)	22s
server-ai-langchain-windows (3.13)	27s
server-ai-optimization-windows (3.13)	19s
server-ai-langchain-windows (3.10)	28s
server-ai-optimization-windows (3.12)	27s
server-ai-windows (3.10)	23s
server-ai-openai-linux (3.12)	18s
server-ai-openai-windows (3.10)	19s
server-ai-langchain-linux (3.13)	21s
server-ai-openai-linux (3.11)	20s
server-ai-windows (3.11)	20s
server-ai-langchain-windows (3.12)	24s
server-ai-langchain-linux (3.10)	21s
server-ai-linux (3.13)	17s
server-ai-openai-linux (3.10)	20s
server-ai-openai-windows (3.11)	49s
server-ai-linux (3.10)	16s
server-ai-openai-linux (3.13)	20s
server-ai-optimization-windows (3.11)	18s
server-ai-optimization-linux (3.12)	15s
server-ai-openai-windows (3.12)	29s
server-ai-windows (3.13)	22s
server-ai-optimization-linux (3.13)	11s
server-ai-linux (3.11)	20s
server-ai-langchain-linux (3.12)	18s
server-ai-openai-windows (3.13)	2m 3s
server-ai-optimization-linux (3.10)	11s
server-ai-optimization-linux (3.11)	15s
server-ai-optimization-windows (3.10)	17s
server-ai-linux (3.12)	16s
server-ai-windows (3.12)	20s
server-ai-langchain-linux (3.11)	24s
	12m 50s

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