nx_maint_asset_test.nx

nx_maint_asset_test.nx -- gate for the maintenance spine. Proves the PLATFORM THESIS measurably: one verdict engine + per-asset spec DATA judges different assets correctly, and the SAME temperature trace gets DIFFERENT correct verdicts under different specs (so the envelope is data, not code). Also proves honest NOT_IMPLEMENTED for declared-but-unbuilt kernels (never a fabricated verdict). Coverage: - sealed-enum validity (class + kernel) - A HVAC efficient recovery under the HVAC spec - B KILLER: a water-heater recovery trace (120 mC/min) -> EFFICIENT under the WATER_HEATER spec (normal for a slow tank) but DEGRADED under the HVAC spec (too slow for forced air). Same bytes, two correct answers. - C sediment-fouled water heater (60 mC/min) -> DEGRADED under its OWN spec - D rotating-machine kernel (declared, unbuilt) -> NOT_IMPLEMENTED (honest) - E invalid kernel -> BAD_SPEC expect_exit: 0 license_tier: ORIGINAL