Google News RSS stores encrypted article URLs that cannot be resolved
server-side (JS SPA, no HTTP redirects, encrypted base64 IDs). Replace
the failed decode/parse strategies with DuckDuckGo search-based lookup
using article title + publisher name to find actual article pages, then
scrape OG images from those pages.
- Add find_article_url_via_search() using DuckDuckGo HTML endpoint
- Add resolve_article_for_scraping() combining redirect + search fallback
- Mark failed lookups with '_no_image' sentinel to avoid repeated retries
- Backfill button resets sentinels to allow manual re-scraping
- Clean up verbose debug instrumentation from prior attempts
- Update frontend to handle '_no_image' sentinel gracefully
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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