Use ruff linter to fix issues and provide consistent formatting

core/live_data_cache.py

@@ -34,8 +34,7 @@ class LiveDataCache:
             try:
                 callback(value)
             except Exception:
-                logging.exception("Listener raised an exception for key %s", key)
-
+                logging.exception(f"Listener raised an exception for key {key}")
 
     def get(self, key, default=None):
         with self._lock:
@@ -71,7 +70,7 @@ class LiveDataCache:
         try:
             self._disk_cache.set("snapshot", data)
         except Exception as e:
-            logging.exception("Failed to write snapshot to %s", self._snapshot_dir, e)
+            logging.exception(f"Failed to write snapshot to {self._snapshot_dir}")
 
     def _load_snapshot(self):
         data = self._disk_cache.get("snapshot")
@@ -84,7 +83,7 @@ class LiveDataCache:
                 # Only restore entries that would still be within TTL
                 if now - saved_at < self._ttl:
                     self._cache[key] = value
-        logging.info("Loaded snapshot from %s", self._snapshot_dir)
+        logging.info(f"Loaded snapshot from {self._snapshot_dir}")
 
     def _start_periodic_snapshot(self, interval):
         def loop():