SIENTIAPDE-1243: Fix: Corrected dataframe inference and mlflow repository tests, and updated activity method calls in format and export prediction tests.

model_manager/utils/filters/mlflow_filters.py

@@ -54,8 +54,8 @@ def nan_values_filter(predictions: DataFrame, _config: dict) -> bool:
     """
     data = (
         predictions.replace({None: np.nan})
+        .infer_objects(copy=False)
         .drop(columns=['timestamp'], errors='ignore')
-        .infer_objects()
     )
 
     if data.isna().all().all():