docs: add new metric columns to supabase migration instructions

MIGRATION_EXPERIMENTS.md

@@ -34,8 +34,16 @@ CREATE TABLE IF NOT EXISTS experiments (
   
   baseline_units NUMERIC,
   baseline_revenue NUMERIC,
+  baseline_gv NUMERIC,
+  baseline_cvr NUMERIC,
+  baseline_acos NUMERIC,
+  
   experiment_units NUMERIC,
   experiment_revenue NUMERIC,
+  experiment_gv NUMERIC,
+  experiment_cvr NUMERIC,
+  experiment_acos NUMERIC,
+  
   actual_lift_percent NUMERIC,
   statistical_significance NUMERIC,
   
@@ -43,6 +51,15 @@ CREATE TABLE IF NOT EXISTS experiments (
   owner TEXT
 );
 
+-- Si la tabla ya existe y necesitas actualizarla, usa:
+-- ALTER TABLE experiments 
+-- ADD COLUMN IF NOT EXISTS baseline_gv NUMERIC,
+-- ADD COLUMN IF NOT EXISTS baseline_cvr NUMERIC,
+-- ADD COLUMN IF NOT EXISTS baseline_acos NUMERIC,
+-- ADD COLUMN IF NOT EXISTS experiment_gv NUMERIC,
+-- ADD COLUMN IF NOT EXISTS experiment_cvr NUMERIC,
+-- ADD COLUMN IF NOT EXISTS experiment_acos NUMERIC;
+
 -- Crear índices para mejorar rendimiento
 CREATE INDEX IF NOT EXISTS idx_experiments_status ON experiments(status);
 CREATE INDEX IF NOT EXISTS idx_experiments_marketplace ON experiments(marketplace);