chore(#65): apply dart format to satisfy CI format check

Reflow the systemDevices.map(...) chain after the .where() removal so
`dart format --set-exit-if-changed .` is clean. No behavior change.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/connector/meshcore_connector.dart

@@ -1458,8 +1458,7 @@ class MeshCoreConnector extends ChangeNotifier {
       _systemScanResults
         ..clear()
         ..addAll(
-          systemDevices
-              .map(
+          systemDevices.map(
             (device) => ScanResult(
               device: device,
               advertisementData: AdvertisementData(