Decouples "tell modeld to go fast" from "steering actually active":
- New LatRequested memory param — controlsd writes when lat would be active
- modeld reads LatRequested (not carControl.latActive) for FPS decision,
so it switches to 20fps immediately on engage request
- controlsd delays CC.latActive becoming true by 250ms (5 frames @ 20fps)
after LatRequested goes true, giving downstream services
(longitudinalPlan, liveCalibration, etc.) time to stabilize at the new rate
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Brian Hanson
2d819c784b