feat: create validated ZUGFeRD invoices in one console command

jr_einvoice/logging_utils.py

@@ -7,8 +7,9 @@ def setup_logging(log_level: str, log_file: Optional[Path]) -> logging.Logger:
     logger = logging.getLogger("jr_einvoice")
     logger.setLevel(logging.DEBUG)
 
-    if list(logger.handlers):
-        return logger
+    for handler in list(logger.handlers):
+        logger.removeHandler(handler)
+        handler.close()
 
     fmt = logging.Formatter(
         fmt="%(asctime)s.%(msecs)03d %(levelname)s [%(name)s] %(message)s",