time_aggregation: add missing logger object

scripts/time_aggregation.py

@@ -47,6 +47,8 @@ from _helpers import (
     update_config_from_wildcards,
 )
 
+logger = logging.getLogger(__name__)
+
 if __name__ == "__main__":
     if "snakemake" not in globals():
         from _helpers import mock_snakemake