🐛 fix(oceanbase/data-grid): 修复 Oracle 时间字段显示编辑与结果视图异常

- 修复 OceanBase Oracle DATE 与 TIMESTAMP 的解码、展示和编辑精度丢失问题
- 修复查询结果与数据视图的行号显示、分页页数和日期列展示口径
- 打通 Oracle 与 OceanBase 会话执行链路的扫描方言透传
- 补齐 DBQuery、DataGrid temporal 和 OceanBase 结果链路回归测试

frontend/src/utils/dataSourceCapabilities.ts

@@ -82,6 +82,13 @@ export const resolveDataSourceType = (config: ConnectionLike): string => {
   return type;
 };
 
+export const shouldShowOceanBaseRowNumberColumn = (config: ConnectionLike): boolean => {
+  if (!config) return false;
+  const type = normalizeDataSourceToken(String(config.type || ''));
+  const driver = normalizeDataSourceToken(String(config.driver || ''));
+  return type === 'oceanbase' || driver === 'oceanbase';
+};
+
 const SQL_QUERY_EXPORT_TYPES = new Set([
   'mysql',
   'goldendb',