Dashboard _get_trending() was querying scores within 1 day only — if the
nightly trend task hadn't run (e.g. worker restarted mid-run), the trending
section returned empty. Now falls back through 1→3→7→30 day windows so
stale scores always surface something.
Trend scorer now wraps per-bill scoring in try/except so a single bad
newsapi/gnews call can't abort the entire 1600-bill run.
Authored by: Jack Levy
41f6f96077