bench mode: live camera via thermald, blinking telemetry indicator

- Unblocked thermald and camerad — thermald manages CPU cores and reads
  fake pandaStates for ignition, bench no longer publishes deviceState
- camerad starts with live camera feed on bench
- Force nvg->update() every frame for HUD repaint without camera dependency
- Blue blinking telemetry circle uses getBool pattern
- camerad debug logging for startup diagnostics

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

system/camerad/main.cc

@@ -7,17 +7,27 @@
 #include "system/hardware/hw.h"
 
 int main(int argc, char *argv[]) {
+  fprintf(stderr, "camerad: starting\n");
+
   if (Hardware::PC()) {
-    printf("exiting, camerad is not meant to run on PC\n");
+    fprintf(stderr, "camerad: exiting, not meant to run on PC\n");
     return 0;
   }
 
   int ret;
+  fprintf(stderr, "camerad: setting realtime priority 53\n");
   ret = util::set_realtime_priority(53);
+  fprintf(stderr, "camerad: set_realtime_priority ret=%d\n", ret);
   assert(ret == 0);
-  ret = util::set_core_affinity({6});
-  assert(ret == 0 || Params().getBool("IsOffroad")); // failure ok while offroad due to offlining cores
 
+  fprintf(stderr, "camerad: setting core affinity to cpu6\n");
+  ret = util::set_core_affinity({6});
+  bool isOffroad = Params().getBool("IsOffroad");
+  fprintf(stderr, "camerad: set_core_affinity ret=%d, IsOffroad=%d\n", ret, isOffroad);
+  assert(ret == 0 || isOffroad); // failure ok while offroad due to offlining cores
+
+  fprintf(stderr, "camerad: starting camerad_thread\n");
   camerad_thread();
+  fprintf(stderr, "camerad: camerad_thread returned\n");
   return 0;
 }