Add postponed and closed flags to Pinned and Notification cards

test/controllers/cards_controller_test.rb

@@ -171,6 +171,7 @@ class CardsControllerTest < ActionDispatch::IntegrationTest
 
     assert_equal card.title, @response.parsed_body["title"]
     assert_equal card.closed?, @response.parsed_body["closed"]
+    assert_equal card.postponed?, @response.parsed_body["postponed"]
     assert_equal 2, @response.parsed_body["steps"].size
     assert_equal card_comments_url(card), @response.parsed_body["comments_url"]
     assert_equal card_reactions_url(card), @response.parsed_body["reactions_url"]

test/controllers/notifications_controller_test.rb

@@ -26,5 +26,9 @@ class NotificationsControllerTest < ActionDispatch::IntegrationTest
     assert_not_nil notification.dig("card", "number")
     assert_not_nil notification.dig("card", "board_name")
     assert_not_nil notification.dig("card", "column")
+
+    card = notifications(:logo_assignment_kevin).card
+    assert_equal card.closed?, notification.dig("card", "closed")
+    assert_equal card.postponed?, notification.dig("card", "postponed")
   end
 end