RGCS v8.5.1

RGCS v8.5.1 — wobbles, corrected lattice coils, session import, automated release builds

Frequency Key Studio gains wobble stage-table modulation: 38 packaged
presets (feathering, staged %, octave/odd/Fibonacci ladders,
golden-ratio and PHI ramps) applied per-layer to carrier or beat with
phase-integrated click-free stepping and a Nyquist guard. External
frequency_session JSON files import and render via
'rgcs-sonic render-file' (documented sample in examples/sonic/).

Phryll Generator v2 coils are corrected to the reference geometry:
copper-CW / silver-CCW multi-start families at +/-45 degrees crossing
in an X lattice centered on the Eye plane, carried through
SCAD/STL/3MF/DXF and the build sheet; crystal-bottom coupling model
(open bottom enforced, O-ring compliant-mount records), source-language
entries, hardware-first excitation ordering. OpenSCAD integration
covers standard Windows install locations and the nightly Manifold
backend, with stated render timeouts.

This release is built and published automatically by the tag-triggered
release workflow: Windows portable zip + per-user Inno Setup installer,
Linux tar.gz, and macOS tar.gz — each smoke-checked, manifested, and
SHA-256'd. All builds unsigned per project policy.

Every exported artifact keeps its claim boundary: designs, estimates,
and audio recipes are model outputs and reproducibility records.
Measurements decide.