feat(poller): skip finished series, keep polling archived ones

backend/store.go

@@ -327,10 +327,15 @@ func (s *Store) Delete(key string) error {
 //
 // Bookmarks with no series_url are skipped — there is nothing to fetch, which
 // is the same filter the userscript applies at L452.
+//
+// Finished series are excluded: nothing more is coming, so fetching them only
+// burns requests. Archived ones are deliberately still polled — knowing what a
+// shelved series is up to is the whole reason for archiving instead of deleting.
 func (s *Store) DueForLatestCheck(cutoffMs int64, limit int) ([]Bookmark, error) {
 	rows, err := s.db.Query(`SELECT `+bookmarkColumns+`
 		FROM bookmarks
 		WHERE series_url IS NOT NULL AND series_url <> ''
+		  AND status IS NOT 'finished'
 		  AND latest_checked_at <= ?
 		ORDER BY latest_checked_at ASC
 		LIMIT ?`, cutoffMs, limit)