feat: add remote products and qr code for payconic

test/database_migration_test.dart

@@ -102,4 +102,11 @@ void main() {
     );
     expect((await database.select(database.products).get()), hasLength(1));
   });
+
+  test('gives products no server picture yet and an empty upload queue', () async {
+    final product = await database.select(database.products).getSingle();
+
+    expect(product.imageId, isNull);
+    expect(await database.select(database.pendingImageUploads).get(), isEmpty);
+  });
 }