style: fix rubocop issues

spec/enterprise/jobs/captain/conversation/response_builder_job_spec.rb

@@ -8,7 +8,7 @@ RSpec.describe Captain::Conversation::ResponseBuilderJob, type: :job do
 
   describe '#perform' do
     let(:conversation) { create(:conversation, inbox: inbox, account: account) }
-    let(:mock_llm_chat_service) { instance_double('Captain::Llm::AssistantChatService') }
+    let(:mock_llm_chat_service) { instance_double(Captain::Llm::AssistantChatService) }
 
     before do
       create(:message, conversation: conversation, content: 'Hello', message_type: :incoming)
@@ -19,7 +19,7 @@ RSpec.describe Captain::Conversation::ResponseBuilderJob, type: :job do
     end
 
     it 'generates and processes response' do
-      expect { described_class.perform_now(conversation, assistant) }.to change { conversation.messages.count }
+      described_class.perform_now(conversation, assistant)
       expect(conversation.messages.count).to eq(2)
       expect(conversation.messages.outgoing.count).to eq(1)
       expect(conversation.messages.last.content).to eq('Hey, welcome to Captain Specs')

spec/enterprise/models/account_spec.rb

@@ -35,9 +35,9 @@ RSpec.describe Account, type: :model do
         :enterprise => { :documents => 300, :responses => 500 }
       }.with_indifferent_access
     end
-    let!(:account) { create(:account, { custom_attributes: { plan_name: 'startups' } }) }
-    let!(:assistant) { create(:captain_assistant, account: account) }
-    let!(:document) { create(:captain_document, assistant: assistant, account: account, status: :available) }
+    let(:account) { create(:account, { custom_attributes: { plan_name: 'startups' } }) }
+    let(:assistant) { create(:captain_assistant, account: account) }
+    let(:document) { create(:captain_document, assistant: assistant, account: account, status: :available) }
 
     before do
       create(:installation_config, name: 'ACCOUNT_AGENTS_LIMIT', value: 20)

spec/enterprise/services/captain/copilot/chat_service_spec.rb

@@ -6,8 +6,8 @@ RSpec.describe Captain::Copilot::ChatService do
   let(:assistant) { create(:captain_assistant, account: account) }
   let(:captain_inbox_association) { create(:captain_inbox, captain_assistant: assistant, inbox: inbox) }
 
-  let(:mock_captain_agent) { instance_double('Captain::Agent') }
-  let(:mock_captain_tool) { instance_double('Captain::Tool') }
+  let(:mock_captain_agent) { instance_double(Captain::Agent) }
+  let(:mock_captain_tool) { instance_double(Captain::Tool) }
 
   describe '#execure' do
     before do

spec/enterprise/services/enterprise/billing/handle_stripe_event_service_spec.rb

@@ -37,7 +37,7 @@ describe Enterprise::Billing::HandleStripeEventService do
   end
 
   describe '#perform' do
-    context 'handle customer.subscription.updated' do
+    context 'when it gets customer.subscription.updated event' do
       it 'updates subscription attributes' do
         allow(event).to receive(:type).and_return('customer.subscription.updated')
         allow(subscription).to receive(:customer).and_return('cus_123')