Change featured tag updates to add/remove activity (#19409)

* Change featured tag updates to add/remove activity

* Fix to check for the existence of feature tag

* Rename service and worker

* Merge AddHashtagSerializer with AddSerializer

* Undo removal of sidekiq_options

app/services/create_featured_tag_service.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+class CreateFeaturedTagService < BaseService
+  include Payloadable
+
+  def call(account, name)
+    @account = account
+
+    FeaturedTag.create!(account: account, name: name).tap do |featured_tag|
+      ActivityPub::AccountRawDistributionWorker.perform_async(build_json(featured_tag), account.id) if @account.local?
+    end
+  rescue ActiveRecord::RecordNotUnique
+    FeaturedTag.by_name(name).find_by!(account: account)
+  end
+
+  private
+
+  def build_json(featured_tag)
+    Oj.dump(serialize_payload(featured_tag, ActivityPub::AddSerializer, signer: @account))
+  end
+end

app/services/remove_featured_tag_service.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class RemoveFeaturedTagService < BaseService
+  include Payloadable
+
+  def call(account, featured_tag)
+    @account = account
+
+    featured_tag.destroy!
+    ActivityPub::AccountRawDistributionWorker.perform_async(build_json(featured_tag), account.id) if @account.local?
+  end
+
+  private
+
+  def build_json(featured_tag)
+    Oj.dump(serialize_payload(featured_tag, ActivityPub::RemoveSerializer, signer: @account))
+  end
+end