Add a retry mechanism for Python runtime exceptions in RegionPropsComputation

Introduce `runWithRetries` method to handle `PythonRuntimeException` with a retry logic, improving the robustness of the computation workflow.

Author: Stefan Hahmann

src/main/java/org/mastodon/mamut/linking/trackastra/appose/computation/RegionPropsComputation.java

@@ -29,6 +29,7 @@
 
 import org.apposed.appose.NDArray;
 import org.apposed.appose.Service;
+import org.mastodon.mamut.detection.PythonRuntimeException;
 import org.mastodon.mamut.io.exporter.labelimage.ExportLabelImageUtils;
 import org.mastodon.mamut.linking.trackastra.TrackastraUtils;
 import org.mastodon.mamut.linking.trackastra.appose.types.SingleTimepointRegionProps;
@@ -131,7 +132,7 @@ private SingleTimepointRegionProps computeSingleTimepointProps( final Source< ?
 			inputs.put( IMAGE, imageNDArray );
 			inputs.put( MASK, masksNDArray );
 
-			Service.Task result = runScript();
+			Service.Task result = runWithRetries( 1, 10 );
 			ShmImg< IntType > labels = new ShmImg<>( ( NDArray ) result.outputs.get( LABELS ) );
 			ShmImg< IntType > timepoints = new ShmImg<>( ( NDArray ) result.outputs.get( TIMEPOINTS ) );
 			LoopBuilder.setImages( timepoints ).multiThreaded().forEachPixel( p -> p.set( timepoint ) ); // all timepoints are the same
@@ -148,6 +149,27 @@ private SingleTimepointRegionProps computeSingleTimepointProps( final Source< ?
 		}
 	}
 
+	private Service.Task runWithRetries( final int attempt, final int maxRetries ) throws IOException
+	{
+		try
+		{
+			return runScript();
+		}
+		catch ( PythonRuntimeException e )
+		{
+			if ( attempt <= maxRetries )
+			{
+				log.warn( "Python runtime exception on attempt {}/{}. Retrying...", attempt, maxRetries );
+				return runWithRetries( attempt + 1, maxRetries );
+			}
+			else
+			{
+				log.error( "Python runtime exception on final attempt {}/{}. No more retries.", attempt, maxRetries );
+				throw e;
+			}
+		}
+	}
+
 	private void formatProgress( final int done, final int todo )
 	{
 		double progress = ( double ) done / todo;