modeld: raise minimum lateral control speed to 1.6 m/s

Port of commaai/openpilot#39174. Below this speed modeld holds the
previous desired curvature instead of following the model, so the
wheel stops chasing noisy plans while creeping or stopped.
Applied to both selfdrive/modeld and sunnypilot modeld_v2.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ATDgLMxRqNpP9H2Ndeg65v

openpilot/selfdrive/modeld/modeld.py

@@ -49,7 +49,7 @@ SEND_RAW_PRED = os.getenv('SEND_RAW_PRED')
 
 LAT_SMOOTH_SECONDS = 0.0
 LONG_SMOOTH_SECONDS = 0.3
-MIN_LAT_CONTROL_SPEED = 0.3
+MIN_LAT_CONTROL_SPEED = 1.6
 BIG_MODEL_TIMEOUT = 60
 
 

openpilot/sunnypilot/modeld_v2/modeld.py

@@ -102,7 +102,7 @@ class ModelState(ModelStateBase):
 
     self.LAT_SMOOTH_SECONDS = float(overrides.get('lat', ".0"))
     self.LONG_SMOOTH_SECONDS = float(overrides.get('long', ".0"))
-    self.MIN_LAT_CONTROL_SPEED = 0.3
+    self.MIN_LAT_CONTROL_SPEED = 1.6
     self.PLANPLUS_CONTROL: float = 1.0
     self.chestnut = chestnut