modeld standby, fan standstill clamping, log rotation, diagnostic logging

- modeld standby: skip inference at standstill (model stays loaded in GPU),
  ModelStandby param + ModelStandbyTs heartbeat for race-free suppression
- controlsd: suppress commIssue/modeldLagging when ModelStandbyTs < 2s old,
  ignore telemetryd/dashcamd in process_not_running check
- Fan controller: standstill below 74°C clamps to 0-10% (near silent),
  standstill above 74°C allows 0-100%, thermald reads carState.standstill
- Deleter: enforce 4GB quota on /data/log2 session logs, oldest-first cleanup
- Diagnostic logging: steerTempUnavailable and controlsdLagging log to stderr
  with full context (steering angle, torque, speed, remaining time)
- CLAUDE.md: document memory params method name difference (C++ camelCase
  vs Python snake_case)

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

selfdrive/thermald/fan_controller.py

@@ -8,7 +8,7 @@ from openpilot.selfdrive.controls.lib.pid import PIDController
 
 class BaseFanController(ABC):
   @abstractmethod
-  def update(self, cur_temp: float, ignition: bool) -> int:
+  def update(self, cur_temp: float, ignition: bool, standstill: bool = False) -> int:
     pass
 
 
@@ -20,9 +20,21 @@ class TiciFanController(BaseFanController):
     self.last_ignition = False
     self.controller = PIDController(k_p=0, k_i=4e-3, k_f=1, rate=(1 / DT_TRML))
 
-  def update(self, cur_temp: float, ignition: bool) -> int:
-    self.controller.neg_limit = -(100 if ignition else 30)
-    self.controller.pos_limit = -(30 if ignition else 0)
+  def update(self, cur_temp: float, ignition: bool, standstill: bool = False) -> int:
+    # CLEARPILOT: at standstill below 74°C, clamp to 0-10% (near silent)
+    # at standstill above 74°C, allow full 0-100% range
+    if ignition and standstill and cur_temp < 74:
+      self.controller.neg_limit = -10
+      self.controller.pos_limit = 0
+    elif ignition and standstill:
+      self.controller.neg_limit = -100
+      self.controller.pos_limit = 0
+    elif ignition:
+      self.controller.neg_limit = -100
+      self.controller.pos_limit = -30
+    else:
+      self.controller.neg_limit = -30
+      self.controller.pos_limit = 0
 
     if ignition != self.last_ignition:
       self.controller.reset()