Refactor and clean up codebase

- Removed unused constants and type aliases in app_spi_command_defs.h and temp_sensor.h.
- Simplified ISpiCommandHandler destructor to default.
- Eliminated redundant methods and comments in temp_sensor and usart0 files.
- Consolidated writeU32Le function to app_spi_command_defs.h for reuse.
- Updated comments for clarity and accuracy in task_manager.h and task_runner.cpp.
- Removed hardfault.h as it contained no declarations.
- Cleaned up CANFD and watchdog implementations by removing dead code and unnecessary comments.
- Updated version numbers in config.h to reflect recent changes.
- Enhanced error handling and diagnostics in hardfault handling.

GD32E508_DCU_APP/sys/task_runner.cpp

@@ -59,7 +59,7 @@ static float medianFilter(const float *buffer)
 } // namespace
 
 struct TaskRunner::Runtime {
-    temp_sensor_data_t sample{};
+    Adc::Sample sample{};
     float temperature_samples[kAdcFilterWindow] = {0.0f};
     float vdda_samples[kAdcFilterWindow] = {0.0f};
     float vin_adc_samples[kAdcFilterWindow] = {0.0f};
@@ -134,15 +134,6 @@ void TaskRunner::taskAdcProcess()
     s.valid = sampleValid ? 1U : 0U;
 }
 
-/**
- * @brief 执行兼容保留的 CAN 接收轮询任务。
- * @param[in]  无。
- * @param[out] 无。
- * @retval    无返回值。
- * @note      当前三路 CANFD 接收已由 RX0 中断驱动，该任务仅保留接口兼容性。
- */
-void TaskRunner::taskCanRxPoll()   { CanFd::poll(); }
-
 /**
  * @brief 执行 CAN 周期发送任务：每 1ms 在每个使能通道上发送一帧 CANFD 测试帧。
  * @param[in]  无。
@@ -231,7 +222,7 @@ void TaskRunner::taskStatusLed()      { /* 预留 */ }
  * @param[in]  无。
  * @param[out] 无。
  * @retval    无返回值。
- * @note      当前仅保留任务入口。
+ * @note      当前任务:推进 OTA Boot 请求、刷新 CAN 反馈快照、启动反馈推送轮次。
  */
 void TaskRunner::taskHeartbeat()      { OtaBootRequest::process(); CanFd::refreshFeedbackSnapshot(); canFeedbackStartRound(); }
 
@@ -382,7 +373,6 @@ void TaskRunner::runPending()
     if(pending & (1UL << TASK_ADC_VREF_SAMPLE))  taskAdcVrefSample();
     if(pending & (1UL << TASK_ADC_TEMP_SAMPLE))  taskAdcTempSample();
     if(pending & (1UL << TASK_ADC_PROCESS))      taskAdcProcess();
-    if(pending & (1UL << TASK_CAN_RX_POLL))      taskCanRxPoll();
     if(pending & (1UL << TASK_CAN_RX_PARSE))     taskCanRxParse();
     if(pending & (1UL << TASK_CAN_TX_SEND))      taskCanTxSend();
     if(pending & (1UL << TASK_STATUS_LED))       taskStatusLed();