fix: Ensure pipelines that modify feature set are supported for fast backtesting

Author: robcaulk

freqtrade/freqai/data_drawer.py

@@ -493,7 +493,7 @@ def save_metadata(self, dk: FreqaiDataKitchen) -> None:
 
         dk.data["data_path"] = str(dk.data_path)
         dk.data["model_filename"] = str(dk.model_filename)
-        dk.data["training_features_list"] = list(dk.data_dictionary["train_features"].columns)
+        dk.data["training_features_list"] = dk.training_features_list
         dk.data["label_list"] = dk.label_list
 
         with (save_path / f"{dk.model_filename}_{METADATA}.json").open("w") as fp:

freqtrade/freqai/freqai_interface.py

@@ -514,12 +514,7 @@ def check_if_feature_list_matches_strategy(self, dk: FreqaiDataKitchen) -> None:
                    current coin/bot loop
         """
 
-        if "training_features_list_raw" in dk.data:
-            feature_list = dk.data["training_features_list_raw"]
-        else:
-            feature_list = dk.data["training_features_list"]
-
-        if dk.training_features_list != feature_list:
+        if dk.training_features_list != dk.data["training_features_list"]:
             raise OperationalException(
                 "Trying to access pretrained model with `identifier` "
                 "but found different features furnished by current strategy. "