Every agentic run, as a universe

Each centre is an environment where work runs; each node is a unit of work at its altitude (A3 agent, A2 loop, A1 LLM call, A0 compute) signed by a key that lived only while it ran; each flow is a parent handing work to a child. From /api/v1/altitude-runs.json. Live start, middle and end of each unit: Elastic, Flows: the beginning, the middle and the end.