Evaluate predictions with nerval

Based on !340 (merged)

Closes #231 (closed)

dan/ocr/manager/metrics.py

@@ -162,7 +162,6 @@ class MetricManager:
             metrics["time"] = [values["time"]]
 
         gt, prediction = values["str_y"], values["str_x"]
-
         for metric_name in metric_names:
             match metric_name:
                 case (