Fix Puppeteer crash handler error in Docker

Add --disable-crash-reporter flag to Puppeteer launch args to fix
"chrome_crashpad_handler: --database is required" error that occurs
when running in Docker containers with system Chromium.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/services/scraper.ts

@@ -256,6 +256,7 @@ async function scrapeWithBrowser(url: string): Promise<string> {
       '--disable-dev-shm-usage',
       '--disable-blink-features=AutomationControlled',
       '--disable-infobars',
+      '--disable-crash-reporter',
       '--window-size=1920,1080',
       '--start-maximized',
     ],