Balcony Rain Tarp Grommet Afteruse Receipt Mechanics

The review is state-pressure driven by a future reader trying to consume the grommet as weather-liability proof. The required evidence surface is balcony section, grommet row or explicit absence, water path, usher witness or explicit absence, sponsor claim, proof bridge, selected posture, after-state, future route effect, and named counter deltas.

Counters exposed by the runtime include rainTarpAfteruseProgress, balconySafetyTrust, sponsorRainCoverPressure, weatherLiabilityHeat, and futureRouteCost.