fix: Corrected syntax error in print_signal function definition.

src/utils/data_utils.py

@@ -71,7 +71,7 @@ def validate_signal_date(signal_date: datetime) -> datetime:
         return current_date
     return signal_date
 
-def print_signal(signal_ dict, signal_type: str = "🔍") -> None:
+def print_signal(signal_dict, signal_type: str = "🔍") -> None:
     """
     Print standardized signal output