feat(gl): add immutable postgres ledger storage

cmd/gl/main.go

@@ -10,6 +10,7 @@ import (
 
 	"gl/application/health"
 	"gl/infrastructure/config"
+	"gl/infrastructure/postgres"
 	grpcadapter "gl/interface/grpc"
 )
 
@@ -26,7 +27,18 @@ func main() {
 	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
 	defer stop()
 
-	handler := grpcadapter.NewHealthHandler(health.NewService(nil))
+	database, err := postgres.Open(ctx, cfg.Database)
+	if err != nil {
+		slog.Error("open GL database", "error", err)
+		os.Exit(1)
+	}
+	defer database.Close()
+	if err := postgres.Migrate(ctx, database); err != nil {
+		slog.Error("migrate GL database", "error", err)
+		os.Exit(1)
+	}
+
+	handler := grpcadapter.NewHealthHandler(health.NewService(database))
 	slog.Info("starting GL gRPC service", "host", cfg.GRPC.Host, "port", cfg.GRPC.Port)
 	serverConfig := grpcadapter.ServerConfig{
 		Host:            cfg.GRPC.Host,