Status View: Poll ids are strings.

All ids in mastodon are strings, in general.

lib/pleroma/web/mastodon_api/views/status_view.ex

@@ -382,7 +382,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       %{
         # Mastodon uses separate ids for polls, but an object can't have
         # more than one poll embedded so object id is fine
-        id: object.id,
+        id: to_string(object.id),
         expires_at: Utils.to_masto_date(end_time),
         expired: expired,
         multiple: multiple,

test/web/mastodon_api/status_view_test.exs

@@ -423,7 +423,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusViewTest do
       expected = %{
         emojis: [],
         expired: false,
-        id: object.id,
+        id: to_string(object.id),
         multiple: false,
         options: [
           %{title: "absolutely!", votes_count: 0},