feat: integrate azure storage handling in migration pipeline

Stream transformer output to an Azure blob container when a job declares ToStorage, with per-job prefix and credential configuration.

cmd/go_migrate/log.go

@@ -3,6 +3,7 @@ package main
 import (
 	"time"
 
+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -13,5 +14,13 @@ func configureLog() {
 		DisableSorting:  false,
 		PadLevelText:    true,
 	})
-	log.SetLevel(log.DebugLevel)
+
+	logLevelEnv := config.App.LogLevel
+	logLevel, err := log.ParseLevel(logLevelEnv)
+	if err != nil {
+		log.Warnf("Nivel de log inválido '%s', usando INFO por defecto", logLevelEnv)
+		logLevel = log.InfoLevel
+	}
+
+	log.SetLevel(logLevel)
 }