fix pyright

Signed-off-by: zjgemi <[email protected]>

Author: zjgemi

dpgen2/exploration/report/report_trust_levels_max.py

@@ -41,7 +41,9 @@ def converged(
         converged  bool
             If the exploration is converged.
         """
-        return self.accurate_ratio() >= self.conv_accuracy
+        accurate_ratio = self.accurate_ratio()
+        assert isinstance(accurate_ratio, float)
+        return accurate_ratio >= self.conv_accuracy
 
     def get_candidate_ids(
         self,