WiFi-DensePose WorldGraph (ADR-139)

The environmental digital twin for the RuView streaming engine: a typed [petgraph] StableDiGraph of rooms, zones, walls, doorways, sensors, RF links, person tracks, object anchors, events, and semantic-state beliefs, connected by typed relations (observes / located_in / adjacent_to / supports / contradicts / derived_from / privacy_limited_by).

It sits downstream of fusion (ADR-137) — storing fused beliefs, not raw frames — and upstream of the semantic/agent layer (ADR-140) and evaluation harness (ADR-145). Every [model::WorldNode::SemanticState] carries mandatory [model::SemanticProvenance] (signal evidence + model + calibration + privacy decision), honouring the house rule structurally.

Persistence is via [graph::WorldGraph::to_json] / [graph::WorldGraph::from_json] (the RVF payload); the serde-enum node/edge model guarantees a deterministic, schema-versioned wire layout.