* chore(deps): bump ruv-neural submodule — ColorMap no_std for ESP32
Points to ruvnet/ruv-neural#3 (c9638fa): ruv-neural-viz::ColorMap now
builds no_std, so it can run on the ESP32. Unblocks driving the onboard
WS2812 from the viridis/cool-warm colormap.
Co-Authored-By: claude-flow <ruv@ruv.net>
* feat(firmware): onboard LED as 40 Hz gamma stimulus, colour from live CSI motion (ADR-183)
The S3 onboard WS2812 (GPIO 48, #962) now runs a GENUS-style 40 Hz gamma
square wave (12.5 ms on/off, 50% duty). The ON-phase colour is live CSI
motion (edge motion_energy) mapped through a 60-step viridis LUT generated
from ruv-neural-viz::ColorMap::viridis() — still=purple, moving=yellow.
Uses the now-no_std ColorMap (ruvnet/ruv-neural#3 / #1126). Hardware-
confirmed on ESP32-S3 N16R8 (COM8): boot log shows the timer armed, CSI
keeps flowing (27-38 pps). Honesty + photosensitivity notes + a Kconfig-gate
follow-up are in ADR-183.
Co-Authored-By: claude-flow <ruv@ruv.net>
a4c2935a2f