feat: Introduce ManagedAgent and AgentRunner implementations (#110) #107

Job	Run time
release-please	41s
manual-publish	-1s
release-server-ai-openai	0s
release-server-ai-optimization	0s
release-server-ai-langchain	0s
release-server-ai	0s
release-server-ai-optimization-provenance	0s
release-server-ai-provenance	0s
release-server-ai-openai-provenance	0s
release-server-ai-langchain-provenance	0s
	40s

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