◌ Data provenancePhase 1 uses real public datasets for postcode-level solar installation context, product mix, and facility locations. Site locations, risk scores, collection status, and mass are illustrative demo scenarios. CER data only supports postcode-level install counts and age cohorts, so each postcode demand area is collected once in both routes. Facility locations are real. Solar-specific acceptance and daily processing capacity are assumptions unless separately verified with the operator.