Change /api/v1/statuses/:id/history to always return at least one item (#25510)

app/controllers/api/v1/statuses/histories_controller.rb

@@ -8,11 +8,15 @@ class Api::V1::Statuses::HistoriesController < Api::BaseController
 
   def show
     cache_if_unauthenticated!
-    render json: @status.edits.includes(:account, status: [:account]), each_serializer: REST::StatusEditSerializer
+    render json: status_edits, each_serializer: REST::StatusEditSerializer
   end
 
   private
 
+  def status_edits
+    @status.edits.includes(:account, status: [:account]).to_a.presence || [@status.build_snapshot(at_time: @status.edited_at || @status.created_at)]
+  end
+
   def set_status
     @status = Status.find(params[:status_id])
     authorize @status, :show?