[API] Fixed retrieving date in insert batch metrics command.

Author: guillesanz21

api/anomaly_detection/predictions/management/commands/insert_batch_metrics.py

@@ -36,7 +36,7 @@ def unify_metrics(self, files, *args, **kwargs):
         # Loop through the files
         for file in files:
             try:
-                date = file.split("bites_")[1].split(".")[0]
+                date = file.split("/")[-1].split("bites_")[1].split(".")[0]
                 df_day = pd.read_csv(file)
                 df_day["date"] = date
                 dfs.append(df_day)