Q-SETUN v2.1.0 — ternary hysteresis memory, live threshold self-reinforcement, wave energy & trit density

What's new in 2.1.0

Added

• Ternary Hysteresis Memory (configure(hysteresis_q8)) — trits now hold state across the threshold edge; deep sign flips still captured instantly. Verified: -34.3% trit chatter, 90.0% of waves preserved.
• Live Threshold Self-Reinforcement (configure(live_sigma)) — thresholds re-derived from running variance every feed; a 16x noise-floor jump: 1530 false beats (fixed) vs 4 (live).
• QState.wave_energy — accumulated |diff| inside the closed cycle.
• QState.wave_trit_density_pct — share of non-zero trits in the cycle.
• 9 telemetry getters (parity with the lab fork): getVarianceEMA, getPosThreshold, getNegThreshold, getChargeLimit, getBaselineEMA, getTritRing, getRingHead, setBaselineEMA, setVarianceEMA.
• Regression equivalence suite (benchmarks/regression_equivalence.py): 104 096 samples -> 0 state mismatches vs v2.0.
• license=GPL-3.0-only in library.properties.

Changed

• Static footprint: 84 B RAM (avr-g++ 7.3, ATmega328P); Flash 1758 B.
• Docs, keywords, metadata updated.

Verified

• 100% integer, zero heap, deterministic O(1).
• Official suite PASS: AVR compile, O(1) determinism, AAMI EC57 clinical, 4/4 stress tests.