Have `Follow` activities bypass availability (#27586)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

app/services/follow_service.rb

@@ -71,7 +71,7 @@ class FollowService < BaseService
     if @target_account.local?
       LocalNotificationWorker.perform_async(@target_account.id, follow_request.id, follow_request.class.name, 'follow_request')
     elsif @target_account.activitypub?
-      ActivityPub::DeliveryWorker.perform_async(build_json(follow_request), @source_account.id, @target_account.inbox_url)
+      ActivityPub::DeliveryWorker.perform_async(build_json(follow_request), @source_account.id, @target_account.inbox_url, { 'bypass_availability' => true })
     end
 
     follow_request

app/workers/activitypub/delivery_worker.rb

@@ -23,9 +23,10 @@ class ActivityPub::DeliveryWorker
   HEADERS = { 'Content-Type' => 'application/activity+json' }.freeze
 
   def perform(json, source_account_id, inbox_url, options = {})
-    return unless DeliveryFailureTracker.available?(inbox_url)
-
     @options        = options.with_indifferent_access
+
+    return unless @options[:bypass_availability] || DeliveryFailureTracker.available?(inbox_url)
+
     @json           = json
     @source_account = Account.find(source_account_id)
     @inbox_url      = inbox_url