Model success field in Submit feedback

core/src/main/java/nl/tudelft/ewi/auta/core/dto/SubmitAppFeedbackDto.java

@@ -44,4 +44,9 @@ public class SubmitAppFeedbackDto {
      */
     @Nullable
     public Integer score = null;
+
+    /**
+     * Whether analysis succeeded (true) or encountered an error (false).
+     */
+    public boolean success = true;
 }