Normalize whitespace and add newline in logging.py

Cleanup formatting in ratelink/observability/logging.py: remove extraneous blank lines and trailing spaces around the _include_hostname/_lock assignment and ensure the file ends with a newline. No functional changes.

Author: vladlen-codes

ratelink/observability/logging.py

@@ -26,9 +26,9 @@ def __init__(
         self._log_violations = log_violations
         self._log_config_changes = log_config_changes
         self._include_timestamp = include_timestamp
-        self._include_hostname = include_hostname
-        
+        self._include_hostname = include_hostname       
         self._lock = Lock()
+    
         if not json:
             self._logger = logging.getLogger("rate_limiter.audit")
             self._logger.setLevel(level)
@@ -194,4 +194,4 @@ def log_custom(
     def close(self) -> None:
         if self._sink and self._sink not in (sys.stdout, sys.stderr):
             if isinstance(self._sink, TextIOBase):
-                self._sink.close()
+                self._sink.close()