feat(conversations): add message creation limit lock

spec/controllers/api/v1/webhooks_controller_spec.rb

@@ -0,0 +1,19 @@
+require 'rails_helper'
+
+RSpec.describe 'Webhooks API', type: :request do
+  describe 'POST /webhooks/twitter' do
+    it 'drops message creation locks without reporting an exception' do
+      conversation = create(:conversation)
+      conversation.lock_message_creation!
+      consumer = instance_double(Webhooks::Twitter)
+
+      allow(Webhooks::Twitter).to receive(:new).and_return(consumer)
+      allow(consumer).to receive(:consume).and_raise(CustomExceptions::ConversationMessageCreationLocked.new(conversation))
+      expect(ChatwootExceptionTracker).not_to receive(:new)
+
+      post '/webhooks/twitter', params: { direct_message_events: [] }
+
+      expect(response).to have_http_status(:ok)
+    end
+  end
+end