feat: Audit log APIs (#6434)

- Adds the appropriate APIs for Audit Logs.

ref: #6015

config/initializers/audited.rb

@@ -0,0 +1,5 @@
+# configuration related audited gem : https://github.com/collectiveidea/audited
+
+Audited.config do |config|
+  config.audit_class = 'Enterprise::AuditLog'
+end

config/routes.rb

@@ -45,6 +45,7 @@ Rails.application.routes.draw do
           resources :agents, only: [:index, :create, :update, :destroy]
           resources :agent_bots, only: [:index, :create, :show, :update, :destroy]
           resources :assignable_agents, only: [:index]
+          resource :audit_logs, only: [:show]
           resources :callbacks, only: [] do
             collection do
               post :register_facebook_page