Override `toString()` in `DriftRemoteException`

drift/lib/src/remote/communication.dart

@@ -202,4 +202,7 @@ class DriftRemoteException implements Exception {
   final StackTrace? remoteStackTrace;
 
   DriftRemoteException._(this.remoteCause, this.remoteStackTrace);
+
+  @override
+  String toString() => remoteCause.toString();
 }

drift/test/isolate_test.dart

@@ -85,6 +85,7 @@ void main() {
       fail('Should have thrown an exception');
     } catch (e, s) {
       expect(e, isA<DriftRemoteException>());
+      expect(e.toString(), contains('no such table: non_existing_table'));
 
       // The stack trace of remote exceptions should point towards the actual
       // source making the faulty call.