-- 154_analyze_events_shadow_idx_ts.sql
-- PR-A: shadow_would_route_to 기반 조회 인덱스 (migration 153 분할).
-- shadow 기간 대시보드/분석 쿼리용 partial index.

CREATE INDEX IF NOT EXISTS idx_analyze_events_shadow_ts
    ON analyze_events (created_at)
    WHERE shadow_would_route_to IS NOT NULL;