Use `Account.activitypub` generated scope (#28157)

app/models/account.rb

@@ -442,7 +442,7 @@ class Account < ApplicationRecord
     end
 
     def inboxes
-      urls = reorder(nil).where(protocol: :activitypub).group(:preferred_inbox_url).pluck(Arel.sql("coalesce(nullif(accounts.shared_inbox_url, ''), accounts.inbox_url) AS preferred_inbox_url"))
+      urls = reorder(nil).activitypub.group(:preferred_inbox_url).pluck(Arel.sql("coalesce(nullif(accounts.shared_inbox_url, ''), accounts.inbox_url) AS preferred_inbox_url"))
       DeliveryFailureTracker.without_unavailable(urls)
     end
 

lib/mastodon/cli/accounts.rb

@@ -295,7 +295,7 @@ module Mastodon::CLI
       skip_threshold = 7.days.ago
       skip_domains   = Concurrent::Set.new
 
-      query = Account.remote.where(protocol: :activitypub)
+      query = Account.remote.activitypub
       query = query.where(domain: domains) unless domains.empty?
 
       processed, culled = parallelize_with_progress(query.partitioned) do |account|