Fix account migration not affecting followers on origin server (#11980)

app/services/move_service.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+class MoveService < BaseService
+  def call(migration)
+    @migration      = migration
+    @source_account = migration.account
+    @target_account = migration.target_account
+
+    update_redirect!
+    process_local_relationships!
+    distribute_update!
+    distribute_move!
+  end
+
+  private
+
+  def update_redirect!
+    @source_account.update!(moved_to_account: @target_account)
+  end
+
+  def process_local_relationships!
+    MoveWorker.perform_async(@source_account.id, @target_account.id)
+  end
+
+  def distribute_update!
+    ActivityPub::UpdateDistributionWorker.perform_async(@source_account.id)
+  end
+
+  def distribute_move!
+    ActivityPub::MoveDistributionWorker.perform_async(@migration.id)
+  end
+end