feat(ee): Add a service to fetch website content and prepare a persona of Captain Assistant (#12732)

This PR is the first of many to simplify the process of building an
assistant. The new flow will only require the user’s website. We’ll
automatically crawl it, identify the business name and what the business
does, and then generate a suggested assistant persona, complete with a
proposed name and description.

This service returns the following.
Example: tooljet.com
<img width="795" height="217" alt="Screenshot 2025-10-25 at 2 55 04 PM"
src="https://github.com/user-attachments/assets/9cb3594a-9c9c-4970-a0a1-4c9c8869c193"
/>

Example: replit.com
<img width="797" height="176" alt="Screenshot 2025-10-25 at 2 56 42 PM"
src="https://github.com/user-attachments/assets/6a1b4266-aab6-455f-a5e3-696d3a8243c9"
/>

spec/enterprise/services/captain/onboarding/website_analyzer_service_spec.rb

@@ -0,0 +1,99 @@
+require 'rails_helper'
+
+RSpec.describe Captain::Onboarding::WebsiteAnalyzerService do
+  let(:website_url) { 'https://example.com' }
+  let(:service) { described_class.new(website_url) }
+  let(:mock_crawler) { instance_double(Captain::Tools::SimplePageCrawlService) }
+  let(:mock_client) { instance_double(OpenAI::Client) }
+
+  before do
+    create(:installation_config, name: 'CAPTAIN_OPEN_AI_API_KEY', value: 'test-key')
+    allow(Captain::Tools::SimplePageCrawlService).to receive(:new).and_return(mock_crawler)
+    allow(service).to receive(:client).and_return(mock_client)
+    allow(service).to receive(:model).and_return('gpt-3.5-turbo')
+  end
+
+  describe '#analyze' do
+    context 'when website content is available and OpenAI call is successful' do
+      let(:openai_response) do
+        {
+          'choices' => [{
+            'message' => {
+              'content' => {
+                'business_name' => 'Example Corp',
+                'suggested_assistant_name' => 'Alex from Example Corp',
+                'description' => 'You specialize in helping customers with business solutions and support'
+              }.to_json
+            }
+          }]
+        }
+      end
+
+      before do
+        allow(mock_crawler).to receive(:body_text_content).and_return('Welcome to Example Corp')
+        allow(mock_crawler).to receive(:page_title).and_return('Example Corp - Home')
+        allow(mock_crawler).to receive(:meta_description).and_return('Leading provider of business solutions')
+        allow(mock_crawler).to receive(:favicon_url).and_return('https://example.com/favicon.ico')
+        allow(mock_client).to receive(:chat).and_return(openai_response)
+      end
+
+      it 'returns success' do
+        result = service.analyze
+
+        expect(result[:success]).to be true
+        expect(result[:data]).to include(
+          business_name: 'Example Corp',
+          suggested_assistant_name: 'Alex from Example Corp',
+          description: 'You specialize in helping customers with business solutions and support',
+          website_url: website_url,
+          favicon_url: 'https://example.com/favicon.ico'
+        )
+      end
+    end
+
+    context 'when website content is errored' do
+      before do
+        allow(mock_crawler).to receive(:body_text_content).and_raise(StandardError, 'Network error')
+      end
+
+      it 'returns error' do
+        result = service.analyze
+
+        expect(result[:success]).to be false
+        expect(result[:error]).to eq('Failed to fetch website content')
+      end
+    end
+
+    context 'when website content is unavailable' do
+      before do
+        allow(mock_crawler).to receive(:body_text_content).and_return('')
+        allow(mock_crawler).to receive(:page_title).and_return('')
+        allow(mock_crawler).to receive(:meta_description).and_return('')
+      end
+
+      it 'returns error' do
+        result = service.analyze
+
+        expect(result[:success]).to be false
+        expect(result[:error]).to eq('Failed to fetch website content')
+      end
+    end
+
+    context 'when OpenAI error' do
+      before do
+        allow(mock_crawler).to receive(:body_text_content).and_return('Welcome to Example Corp')
+        allow(mock_crawler).to receive(:page_title).and_return('Example Corp - Home')
+        allow(mock_crawler).to receive(:meta_description).and_return('Leading provider of business solutions')
+        allow(mock_crawler).to receive(:favicon_url).and_return('https://example.com/favicon.ico')
+        allow(mock_client).to receive(:chat).and_raise(StandardError, 'API error')
+      end
+
+      it 'returns error' do
+        result = service.analyze
+
+        expect(result[:success]).to be false
+        expect(result[:error]).to eq('API error')
+      end
+    end
+  end
+end