Prior commit inteneded for blinker to veto force stop from activating during a turn/curves.
If blinker was on, it was vetoing actual force stops. This tweaks is so the veto only works
on actual turns, or if force stop was already on. So force stop will stop, then allow turn without reactivating force stop.
Force Stop (cem_path) was missing a tracking_lead guard, causing it to activate behind stopped leads at red lights and stop signs — stopping the car far short of the lead instead of letting ACC handle following distance. Added and not self.starpilot_planner.tracking_lead to cem_path, matching the guard already present on dash_path.
Force Stop 2.0 — Smoother deceleration curve. On cars with the ADAS stop-sign signal, stops are even more confident; cars without dashboard stop sign signal will also benefit from a new deceleration curve and MPC handoff.
Toggle off = stock behavior.