Fix Zeitwerk loading issues for middleware and errors

- Add require_relative for base.rb in middleware classes
- Add explicit require for errors.rb in main module
- Fix module loading order to prevent uninitialized constant errors

Author: vipulnsward

lib/uploadcare.rb

@@ -2,6 +2,7 @@
 
 require 'zeitwerk'
 require 'faraday'
+require_relative 'uploadcare/errors'
 
 # Ruby wrapper for Uploadcare API
 #

lib/uploadcare/middleware/logger.rb

@@ -2,6 +2,8 @@
 
 require 'logger'
 
+require_relative 'base'
+
 module Uploadcare
   module Middleware
     class Logger < Base

lib/uploadcare/middleware/retry.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require_relative 'base'
+
 module Uploadcare
   module Middleware
     class Retry < Base