feat (ee): APIs to configure an auto assignment limit for inboxes (#4672)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/models/account.rb

@@ -20,7 +20,6 @@ class Account < ApplicationRecord
   include FlagShihTzu
   include Reportable
   include Featurable
-  prepend_mod_with('Account')
 
   DEFAULT_QUERY_SETTING = {
     flag_query_mode: :bit_operator,
@@ -146,3 +145,5 @@ class Account < ApplicationRecord
     ActiveRecord::Base.connection.exec_query("drop sequence IF EXISTS conv_dpid_seq_#{id}")
   end
 end
+
+Account.prepend_mod_with('Account')