- Replace fragile entry.get("link") with _gnews_entry_url() helper that
checks entry.link attribute then falls back to entry.links[].href,
fixing cases where feedparser puts the URL in a non-standard location
- Lazy news re-fetch on bill detail now only triggers when the stored
trend score confirms gnews_count > 0, preventing endless re-queuing
for bills with genuinely no news coverage
Co-Authored-By: Jack Levy
- Drop global unique constraint on news_articles.url; replace with
(bill_id, url) so the same article can appear for multiple bills
- news_fetcher dedup now scoped to bill_id instead of global URL
- Bill detail endpoint triggers a background news fetch when no
articles are stored, so gnews articles surface on next load
Migration 0009.
Co-Authored-By: Jack Levy
