Use ruff linter to fix issues and provide consistent formatting

providers/sigrefdata/sig_ref_data_provider.py

@@ -19,13 +19,11 @@ class SIGRefDataProvider:
         self.reference_count = 0
         self._stop = False
 
-
     def start(self):
         """Start the provider. This should return immediately after spawning threads to access the remote resources"""
 
         raise NotImplementedError("Subclasses must implement this method")
 
-
     def stop(self):
         """Stop any threads and prepare for application shutdown. Subclasses should implement this method and call
         super()."""
@@ -47,4 +45,4 @@ class SIGRefDataProvider:
                     break
 
         self.reference_count = len(new_data)
-        logging.info(f"Loaded %d references for %s into the data store.", self.reference_count, self.sig_name)
+        logging.info(f"Loaded {self.reference_count} references for {self.sig_name} into the data store.")