fix(#765): clearer recovery log past the sync cap, and name CMD_GET_CONTACT_BY_KEY

Found in the owner's hardware test: a manual refresh after the 3
automatic syncs logged "full sync 4 of 3", and the traffic log showed
the by-key request as CODE_30. Log text only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/connector/meshcore_connector.dart

@@ -3960,10 +3960,13 @@ class MeshCoreConnector extends ChangeNotifier {
       return;
     }
 
+    final syncCount = _contactFullStreams <= contactSyncMaxFullStreams
+        ? 'full sync $_contactFullStreams of $contactSyncMaxFullStreams'
+        : 'full sync $_contactFullStreams, past the $contactSyncMaxFullStreams '
+              'automatic syncs; checking by key';
     _appDebugLogService?.warn(
       'Contact sync short: radio declared ${declared ?? 'no total'}, sent '
-      '$received (full sync $_contactFullStreams of '
-      '$contactSyncMaxFullStreams). Nothing removed.',
+      '$received ($syncCount). Nothing removed.',
       tag: 'ContactSync',
     );
     // A user refresh during the by-key checks only adds what it delivered;

lib/services/ble_debug_log_service.dart

@@ -167,6 +167,8 @@ class BleDebugLogService extends ChangeNotifier {
         return 'CMD_RESET_PATH';
       case cmdRemoveContact:
         return 'CMD_REMOVE_CONTACT';
+      case cmdGetContactByKey:
+        return 'CMD_GET_CONTACT_BY_KEY';
       case cmdReboot:
         return 'CMD_REBOOT';
       case cmdGetBattAndStorage: