fix: add TechCrunch source and increase retries for flaky generation test

The live generation test depends on real OpenAI + web scraping.
Adding a second source improves chances of finding articles.
Retries increased from 1 to 2.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

e2e/playwright.config.ts

@@ -17,7 +17,7 @@ dotenv.config({ path: resolve(__dirname, '.env.test') });
 export default defineConfig({
   testDir: './tests',
   timeout: 30_000,
-  retries: 1,
+  retries: 2,
   workers: 1,
 
   use: {

e2e/tests/generation-live.spec.ts

@@ -179,6 +179,13 @@ test.describe('Live generation with OpenAI', () => {
     });
     expect(sourceResp.status).toBe(201);
 
+    // Add a second source for better coverage
+    await apiCall(page, 'POST', '/api/v1/sources', {
+      title: 'TechCrunch AI',
+      url: 'https://techcrunch.com/category/artificial-intelligence/',
+      theme_id: themeId,
+    });
+
     // Step 5: Trigger generation
     const genResp = await apiCall(
       page,