-- ML 앙상블 스코어 컬럼 추가 (stock_analysis 테이블)
-- 실행: psql -d autostock_db -f migrations/add_ml_ensemble_columns.sql

ALTER TABLE stock_analysis ADD COLUMN IF NOT EXISTS ml_score INTEGER;
ALTER TABLE stock_analysis ADD COLUMN IF NOT EXISTS ml_confidence NUMERIC(5, 4);
ALTER TABLE stock_analysis ADD COLUMN IF NOT EXISTS ml_signal VARCHAR(10);