refactor: enhance config handling and unify main entrypoint

Unify configuration parsing logic across entrypoints and clean up legacy script-side config paths.

cmd/go_migrate/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"flag"
 	"sync"
 	"time"
 
@@ -19,7 +20,18 @@ import (
 func main() {
 	configureLog()
 
-	migrationConfig, err := config.ReadMigrationConfig()
+	configPath := flag.String("config", "", "path to migration config file")
+	flag.Parse()
+
+	if flag.NArg() > 1 {
+		log.Fatalf("only one config file path is allowed")
+	}
+
+	if *configPath == "" && flag.NArg() == 1 {
+		*configPath = flag.Arg(0)
+	}
+
+	migrationConfig, err := config.ReadMigrationConfig(*configPath)
 	if err != nil {
 		log.Fatalf("error leyendo configuracion: %v", err)
 	}
@@ -86,7 +98,7 @@ func main() {
 	log.Infof("Migración terminada. Tablas: %d, Errores: %d, Filas totales: %d", len(results), totalErrors, totalProcessed)
 
 	totalDuration := time.Since(startTime)
-	log.Infof("=== Migration completed successfully! ===")
+	// log.Infof("=== Migration completed successfully! ===")
 	log.Infof("Total migration time: %v", totalDuration)
 }