fix(grid): bound large table previews by byte budget

src-tauri/src/commands/query.rs

@@ -90,6 +90,7 @@ pub async fn execute_multi(
     page_size: Option<usize>,
     max_result_bytes: Option<usize>,
     result_key_columns: Option<Vec<String>>,
+    table_data_preview: Option<bool>,
     result_session_id: Option<String>,
     client_session_id: Option<String>,
     timeout_secs: Option<u64>,
@@ -148,6 +149,7 @@ pub async fn execute_multi(
             page_size,
             max_result_bytes,
             result_key_columns: result_key_columns.unwrap_or_default(),
+            table_data_preview: table_data_preview.unwrap_or(false),
             catalog,
             result_session_id,
             client_session_id,