- discover_active_symbols logs the screener error instead of swallowing silently.
- run_discovery records an explicit error when the universe is empty (surfaces in
the discovery event + Grafana).
- momentum doctor now FAILs when the latest discovery universe is 0 (the morning's
dead screener would have shown red within a minute).
- tests/unit/research/test_discovery.py: pins get_most_actives top<=100 and the
ETF/price-band filtering.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
