System design for physical AI: read-only fire protection monitoring across a hundred factories

This is the engineering summary of an open reference architecture. The paper, its object model as JSON and the model register are free to reuse under CC BY 4.0: https://muhammadumar89.github.io/codeninja-research/factory-fire-monitoring-saudi-arabia/. The operator is described by class, never by name. An operator of industrial cities in Saudi Arabia has a factory estate in the thousands, a hundred of them classed high risk. Fire alarm panels, fire pumps, fire water tanks and energy meters each hold a fragment of fire readiness, and none of it reaches the operator until a periodic round or an i