feat: update tooltip text for test run mode in English and Chinese translations for clarity

web/i18n/en-US/dataset-pipeline.ts

@@ -51,7 +51,7 @@ const translation = {
   },
   testRun: {
     title: 'Test Run',
-    tooltip: 'In Test Run mode, only one file upload at a time is allowed for easier debugging and observation.',
+    tooltip: 'In test run mode, only one document is allowed to be imported at a time for easier debugging and observation.',
     steps: {
       dataSource: 'Data Source',
       documentProcessing: 'Document Processing',

web/i18n/zh-Hans/dataset-pipeline.ts

@@ -51,7 +51,7 @@ const translation = {
   },
   testRun: {
     title: '测试运行',
-    tooltip: '在测试运行模式下，每次只能上传一个文件，便于调试和观察。',
+    tooltip: '在测试运行模式下，每次只能导入一个文档，以便于调试和观察。',
     steps: {
       dataSource: '数据源',
       documentProcessing: '文档处理',