fix(savepoint): wrong savepoint path in download savepoint route

internal/rest/controller/crd.go

@@ -14,6 +14,7 @@ import (
 	"io"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"github.com/danielgtaylor/huma/v2"
 	"go.uber.org/zap"
@@ -128,7 +129,14 @@ func TriggerSavepoint(ctx context.Context, req *JobTriggerSavepointReq) (*JobTri
 }
 
 func DownloadSavepoint(ctx context.Context, req *types.SavepointDownloadReq) (*huma.StreamResponse, error) {
-	folderPath := req.SavepointPath // Change this to your folder path
+	mgr := managed_job.GetManager()
+	job := mgr.GetJob(k8sTypes.UID(req.JobUID))
+	lastSavepointPath := job.GetLastSavepointPath()
+
+	if lastSavepointPath == nil {
+		return nil, huma.Error404NotFound("there is no savepoint path is registered for the job")
+	}
+	folderPath := strings.TrimLeft(*lastSavepointPath, "file:") // Change this to your folder path
 
 	// Create a temporary zip file
 	zipFilePath, err := filepath.Abs("./savepoint.zip")