refact: add log for export

internal/service/task.go

@@ -9,6 +9,7 @@ import (
 	"io"
 	"net/http"
 	"strings"
+	"time"
 
 	"gitea.com/texpixel/document_ai/internal/model/task"
 	"gitea.com/texpixel/document_ai/internal/storage/dao"
@@ -187,8 +188,13 @@ func (svc *TaskService) ExportTask(ctx context.Context, req *task.ExportTaskRequ
 	defer resp.Body.Close()
 
 	if resp.StatusCode != http.StatusOK {
-		body, _ := io.ReadAll(resp.Body)
-		log.Error(ctx, "func", "ExportTask", "msg", "http request failed", "status", resp.StatusCode, "body", string(body))
+		respBody, _ := io.ReadAll(resp.Body)
+		log.Error(ctx, "func", "ExportTask", "msg", "export service returned non-200",
+			"status", resp.StatusCode,
+			"body", string(respBody),
+			"markdown_len", len(markdown),
+			"filename", filename,
+		)
 		return nil, "", fmt.Errorf("export service returned status: %d", resp.StatusCode)
 	}