feat: add auto drainage.

src/device/DeviceManager.h

@@ -105,6 +105,7 @@ private:
     bool startCEScan();
     void initEmptyScanMeasurementID();
     void startDrainage();
+    void startAutoDrainage();
     void startWaterflood();
     void startWaterClean();
     void exitWaterProcess();
@@ -209,6 +210,8 @@ private:
     bool mIsPreviewing = false;
     bool mIsInitializing = false;
     bool mIsAutoLocating = false;
+    bool mIsFirstInTransferPorgress = false;
+    bool mIsAutoDrainage = false;
 
     QString mCurrentScanMeasurementID = "";
     QString mCurrentEmptyMeasurementID = "";