feat: Audit log APIs (#6434)

- Adds the appropriate APIs for Audit Logs.

ref: #6015

spec/enterprise/controllers/api/v1/accounts/audit_logs_controller_spec.rb

@@ -0,0 +1,44 @@
+require 'rails_helper'
+
+RSpec.describe 'Enterprise Audit API', type: :request do
+  let!(:account) { create(:account) }
+  let!(:inbox) { create(:inbox, account: account) }
+  let!(:admin) { create(:user, account: account, role: :administrator) }
+
+  describe 'GET /api/v1/accounts/{account.id}/audit_logs' do
+    context 'when it is an un-authenticated user' do
+      it 'does not fetch audit logs associated with the account' do
+        get "/api/v1/accounts/#{account.id}/audit_logs",
+            as: :json
+        expect(response).to have_http_status(:unauthorized)
+      end
+    end
+
+    context 'when it is an authenticated normal user' do
+      let(:user) { create(:user, account: account) }
+
+      it 'fetches audit logs associated with the account' do
+        get "/api/v1/accounts/#{account.id}/audit_logs",
+            headers: user.create_new_auth_token,
+            as: :json
+        expect(response).to have_http_status(:unauthorized)
+      end
+    end
+
+    # check for response in parse
+    context 'when it is an authenticated admin user' do
+      it 'fetches audit logs associated with the account' do
+        get "/api/v1/accounts/#{account.id}/audit_logs",
+            headers: admin.create_new_auth_token,
+            as: :json
+
+        expect(response).to have_http_status(:success)
+        json_response = JSON.parse(response.body)
+        expect(json_response[0]['auditable_type']).to eql('Inbox')
+        expect(json_response[0]['action']).to eql('create')
+        expect(json_response[0]['audited_changes']['name']).to eql(inbox.name)
+        expect(json_response[0]['associated_id']).to eql(account.id)
+      end
+    end
+  end
+end