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.

internal/app/config/main.go

@@ -1,41 +1,40 @@
 package config
 
 import (
-	"os"
-
+	"github.com/caarlos0/env/v11"
 	"github.com/joho/godotenv"
 	log "github.com/sirupsen/logrus"
 )
 
-type appConfig struct {
-	SourceDbUrl string
-	TargetDbUrl string
+type AzureStorageConfig struct {
+	AccountName string `env:"AZ_ACCOUNT_NAME"`
+	Container   string `env:"AZ_CONTAINER"`
+	AccountKey  string `env:"AZ_ACCOUNT_KEY"`
+	UseHTTPS    bool   `env:"AZ_USE_HTTPS" envDefault:"true"`
+	ServiceURL  string `env:"AZ_SERVICE_URL"`
+	Prefix      string `env:"AZ_PREFIX"`
+	Enabled     bool   `env:"AZ_STORAGE_ENABLED"`
 }
 
-func loadEnv() {
-	err := godotenv.Load()
-	if err != nil {
-		log.Warn("Warning: could not load .env file")
-	}
+type appConfig struct {
+	SourceDbUrl  string `env:"SOURCE_DB_URL,required"`
+	TargetDbUrl  string `env:"TARGET_DB_URL,required"`
+	LogLevel     string `env:"LOG_LEVEL" envDefault:"INFO"`
+	AzureStorage AzureStorageConfig
 }
 
 func getAppConfig() appConfig {
-	loadEnv()
-
-	sourceDbUrl := os.Getenv("SOURCE_DB_URL")
-	if sourceDbUrl == "" {
-		log.Fatal("SOURCE_DB_URL environment variable not set")
+	if err := godotenv.Load(); err != nil {
+		log.Warn("Could not load .env file")
 	}
 
-	targetDbUrl := os.Getenv("TARGET_DB_URL")
-	if targetDbUrl == "" {
-		log.Fatal("TARGET_DB_URL environment variable not set")
+	cfg := appConfig{}
+
+	if err := env.Parse(&cfg); err != nil {
+		log.Fatalf("Error al cargar variables de entorno: %v", err)
 	}
 
-	return appConfig{
-		SourceDbUrl: sourceDbUrl,
-		TargetDbUrl: targetDbUrl,
-	}
+	return cfg
 }
 
 var App appConfig = getAppConfig()