fix: fan 100% on overheat, FCW fps-aware, commIssue suppress, 10min shutdown

- Fan controller: allow full 100% fan when offroad temp >= 75°C (startup cooling)
- ModelFps memory param: modeld publishes actual FPS (20 or 4) so downstream
  consumers can adjust frame-rate-dependent logic
- Longitudinal planner: dynamically adjusts dt and v_desired_filter based on
  ModelFps; FCW crash_cnt threshold scales with FPS to maintain consistent
  0.15s trigger window at both 20fps and 4fps
- controlsd: suppress commIssue alerts for 2s after lateral control engages
  (FPS transition from 4->20 causes transient freq check failures)
- Shutdown timer: hardcoded to 10 minutes (was 45min via FrogPilot param),
  screen taps reset the countdown via ShutdownTouchReset memory param,
  removed Shutdown Timer UI selector from ClearPilot menu

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

selfdrive/thermald/fan_controller.py

@@ -39,6 +39,10 @@ class TiciFanController(BaseFanController):
     elif ignition:
       self.controller.neg_limit = -100
       self.controller.pos_limit = -15
+    # CLEARPILOT: offroad but overheating (startup cooling) — full fan range
+    elif cur_temp >= 75:
+      self.controller.neg_limit = -100
+      self.controller.pos_limit = 0
     else:
       self.controller.neg_limit = -30
       self.controller.pos_limit = 0