Add missing_attribution boolean to preview cards (#38043)

spec/lib/status_cache_hydrator_spec.rb

@@ -19,6 +19,18 @@ RSpec.describe StatusCacheHydrator do
         end
       end
 
+      context 'when handling a new status with a preview card with unverified account attribution' do
+        let(:preview_card) { Fabricate(:preview_card, unverified_author_account: account) }
+
+        before do
+          PreviewCardsStatus.create(status: status, preview_card: preview_card)
+        end
+
+        it 'renders the same attributes as a full render' do
+          expect(subject).to eql(compare_to_hash)
+        end
+      end
+
       context 'when handling a new status with own poll' do
         let(:poll) { Fabricate(:poll, account: account) }
         let(:status) { Fabricate(:status, poll: poll, account: account) }