make pickle load show macs

scanner.py

@@ -58,6 +58,8 @@ def load_state() -> None:
             global _sensors_cache
             _sensors_cache = state.get("sensors", [])
         print("[Scanner] Loaded state from", STATE_FILE)
+        for cached_mac in _mac_cache:
+            print(f"Found {cached_mac}")
     except Exception as exc:
         print("[Scanner] Warning: could not load state:", exc)