When a bill page opens with no stored articles, the backend queues a
fetch_news_for_bill Celery task and returns immediately. Added a retry
loop (up to 3x, 6 s apart) driven off newsArticles state so articles
populate without a manual refresh. Fixed broken useEffect dependency
([billId] → [newsArticles]) that caused the timer to never fire.
News is now fetched via a separate useBillNews query (staleTime: 0)
independent of the cached bill detail response.
Co-Authored-By: Jack Levy
