Feeds were already persisted, but nothing ever re-fetched them after
the initial subscribe — scoring.rs had a TODO where feed polling was
supposed to go. Add a feed_polling job that re-fetches every
subscribed feed, relies on articles.url's unique constraint to skip
ones already seen, and stamps last_fetched_at. Runs once on startup
(so reopening the app catches up immediately) and every 15 minutes
after, ahead of the scoring pass.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QmwX8eafbMstJvt8XPSqft
