jfjoch_viewer: Auto load performance 0.5 - 20 Hz

viewer/JFJochImageReadingWorker.h

@@ -72,8 +72,8 @@ private:
 
     // Adaptive autoload interval based on recent load+analysis time
     MovingAverage autoload_ms_ma{8};          // window size (tune as needed)
-    int autoload_interval_min_ms = 100;        // don't hammer the server/UI
-    int autoload_interval_max_ms = 5000;      // avoid becoming "stuck" slow
+    int autoload_interval_min_ms = 50;        // 20 Hz is the top performance!
+    int autoload_interval_max_ms = 2000;      // 0.5 Hz as bottom limit
     float autoload_safety_factor = 2.0f;
 
     void LoadImage_i(int64_t image_number, int64_t summation);