HeartScale Coherence Rejection Sampling: Inference-Time Alignment via Hidden-State Geometry

HeartScale Coherence Rejection Sampling (HCRS) enforces alignment at inference time using hidden-state geometry — no reward model required. This revision adds a Reference Implementation & Verification note to Data Availability: the paper's falsifiable claims are now numerically verified in the open-source harmonic-engine package (tests/test_new_math.py, passing on CPU). The zero-veto coherence evaluator and product Fisher–Rao vortex drift are implemented and tested in harmonic_engine/geometry.py.