display critical issues

run.py

@@ -25,7 +25,7 @@ if __name__ == "__main__":
         issue_explanation = "; ".join(predicate_strings)
 
         data_issue = DataIssue(
-            severity="medium",
+            severity="high" if issue_metric < 0.5 else "medium",
             title=issue_title,
             description=issue_explanation,
             rows=issue["rows"],