chore: Replace content with outgoing_content in webhook data (#11829)

The API channels don't receive CSAT survey URLs in webhook payloads since `webhook_data` uses content instead of outgoing_content.

app/models/message.rb

@@ -168,7 +168,7 @@ class Message < ApplicationRecord
       additional_attributes: additional_attributes,
       content_attributes: content_attributes,
       content_type: content_type,
-      content: content,
+      content: outgoing_content,
       conversation: conversation.webhook_data,
       created_at: created_at,
       id: id,

spec/models/message_spec.rb

@@ -267,6 +267,23 @@ RSpec.describe Message do
       message = create(:message)
       expect(message.webhook_data.key?(:attachments)).to be false
     end
+
+    it 'uses outgoing_content for webhook content' do
+      message = create(:message, content: 'Test content')
+      expect(message).to receive(:outgoing_content).and_return('Outgoing test content')
+
+      webhook_data = message.webhook_data
+      expect(webhook_data[:content]).to eq('Outgoing test content')
+    end
+
+    it 'includes CSAT survey link in webhook content for input_csat messages' do
+      inbox = create(:inbox, channel: create(:channel_api))
+      conversation = create(:conversation, inbox: inbox)
+      message = create(:message, conversation: conversation, content_type: 'input_csat', content: 'Rate your experience')
+
+      expect(message.outgoing_content).to include('survey/responses/')
+      expect(message.webhook_data[:content]).to include('survey/responses/')
+    end
   end
 
   context 'when message is created' do