Fix Playwright timeout on slow servers

wait_until="networkidle" requires zero network activity for 500ms,
which times out on ad-heavy pages when running on a server. Switch to
domcontentloaded and wait explicitly for div.item-container instead.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

crawl.py

@@ -74,7 +74,8 @@ def get_product_list(n: str, page: Optional[int] = None) -> str:
             "Object.defineProperty(navigator, 'webdriver', {get: () => undefined})"
         )
         pg = context.new_page()
-        pg.goto(url, wait_until="networkidle", timeout=60000)
+        pg.goto(url, wait_until="domcontentloaded", timeout=60000)
+        pg.wait_for_selector("div.item-container", timeout=60000)
 
         if "areyouahuman" in pg.url:
             logger.info("bot detection triggered, simulating mouse movement...")