test updates to take into account exception management

app/utils/data_processing.py

@@ -103,7 +103,8 @@ class PriceProcessor:
         """
         Parse price string into (price, currency) tuple.
 
-        Returns (None, None) if parsing fails
+        Raises ValueError if parsing fails for non-empty input.
+        Returns (None, None) for empty/null input.
         """
         if not price_str or pd.isna(price_str):
             return None, None
@@ -136,5 +137,6 @@ class PriceProcessor:
             except ValueError:
                 pass
 
-        logger.warning(f"Could not parse price: '{price_str}'")
-        return price_str, None
+        # If we get here, parsing failed completely
+        logger.error(f"Could not parse price: '{price_str}'")
+        raise ValueError(f"Invalid price format: '{price_str}'")