-- 160_analyze_events_pr_b_idx.sql
-- PR-B B-1: suppressed_reason partial index (backlog guard 발생 조회용).
-- plan: ~/.claude/plans/swirling-swimming-liskov.md §B-1 R2

CREATE INDEX IF NOT EXISTS idx_analyze_events_suppressed
    ON analyze_events (created_at)
    WHERE suppressed_reason IS NOT NULL;