nx_mcu_fit_gate.nx

nx_mcu_fit_gate.nx -- pins the MCU memory-hierarchy admission decision, using the REAL esp32-ai numbers so the gate is about a shipping workload rather than invented ones. Reference config (measured, esp32-ai RESULTS.md 2026-07-21, ESP32-S3 N16R8): 559K-param dense core at 4 bits = 279,500 B against 512 KB internal SRAM; a 14,912,332 B exported model against 16 MB flash; ~3 MB of KV+scratch against 8 MB PSRAM. That config MUST be admitted (T1) or the organ is useless. The two ways this logic goes wrong, both controlled for: - refusing everything (safe-looking, ships nothing): T1/T6/T7 are positive controls. - treating UNMEASURED as room (silently guessing): T5 refuses it, and T6 proves that refusal is SCOPED -- an unmeasured resource nobody asked for must not block a decidable verdict. T9 pins determinism: when two walls are hit at once the reported binding constraint must not wobble. license_tier: ORIGINAL No hw writes (Rule 26). expect_exit: 0