style: fix RuboCop offenses - add empty lines after module inclusion

Add empty lines after module inclusion in 4 files to comply with
Layout/EmptyLinesAfterModuleInclusion RuboCop rule.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: vipulnsward

lib/uploadcare/entity/file_list.rb

@@ -13,6 +13,7 @@ module Entity
     # @see Uploadcare::Entity::Decorator::Paginator
     class FileList < ApiStruct::Entity
       include Uploadcare::Entity::Decorator::Paginator
+
       client_service Client::FileListClient
 
       attr_entity :next, :previous, :total, :per_page

lib/uploadcare/entity/group_list.rb

@@ -13,6 +13,7 @@ module Entity
     # @see Uploadcare::Entity::Decorator::Paginator
     class GroupList < Entity
       include Uploadcare::Entity::Decorator::Paginator
+
       client_service RestGroupClient, only: :list
 
       attr_entity :next, :previous, :total, :per_page, :results

spec/spec_helper.rb

@@ -10,6 +10,7 @@
 
 RSpec.configure do |config|
   include Uploadcare::Exception
+
   # Enable flags like --only-failures and --next-failure
   config.example_status_persistence_file_path = '.rspec_status'
 

spec/uploadcare/concerns/throttle_handler_spec.rb

@@ -6,6 +6,7 @@
 module Uploadcare
   RSpec.describe Concerns::ThrottleHandler do
     include Concerns::ThrottleHandler
+
     def sleep(_time); end
 
     before { @called = 0 }