fix: improve boot fault visibility and defer watchdog start

Core/Src/main.c

@@ -142,7 +142,6 @@ int main(void)
   /* Initialize all configured peripherals */
   MX_GPIO_Init();
   MX_DMA_Init();
-  MX_IWDG_Init();
   MX_USART1_UART_Init();
   MX_USART2_UART_Init();
   MX_USART3_UART_Init();
@@ -231,7 +230,28 @@ void SystemClock_Config(void)
  */
 void Debug_TrapWithRttHint(const char *tag)
 {
-  debug_log_fault(tag);
+  debug_log_fault_context(tag, __FILE__, __LINE__);
+}
+
+void vApplicationMallocFailedHook(void)
+{
+  debug_log_fault_context("malloc-failed", __FILE__, __LINE__);
+  __disable_irq();
+  for (;;)
+  {
+  }
+}
+
+void vApplicationStackOverflowHook(TaskHandle_t xTask, char *pcTaskName)
+{
+  debug_log_printf("[FAULT] stack-overflow task=%s\r\n",
+                   (pcTaskName != NULL) ? pcTaskName : "(null)");
+  debug_log_fault_context("stack-overflow", __FILE__, __LINE__);
+  (void)xTask;
+  __disable_irq();
+  for (;;)
+  {
+  }
 }
 
 /* USER CODE END 4 */
@@ -244,7 +264,7 @@ void Error_Handler(void)
 {
   /* USER CODE BEGIN Error_Handler_Debug */
   /* User can add his own implementation to report the HAL error return state */
-  debug_log_fault("error-handler");
+  debug_log_fault_context("error-handler", __FILE__, __LINE__);
   __disable_irq();
   while (1)
   {