Change columns default

Author: theletterf

docs/syntax/csv-include.md

@@ -54,7 +54,7 @@ Specify a custom field separator (default is comma):
 The directive includes built-in performance limits to handle large files efficiently:
 
 - **Row limit**: Maximum of 25,000 rows will be displayed
-- **Column limit**: Maximum of 100 columns will be displayed  
+- **Column limit**: Maximum of 10 columns will be displayed  
 - **File size limit**: Maximum file size of 10MB
 
 ## Performance considerations

src/Elastic.Markdown/Myst/Directives/CsvInclude/CsvIncludeBlock.cs

@@ -19,7 +19,7 @@ public class CsvIncludeBlock(DirectiveBlockParser parser, ParserContext context)
 	public string Separator { get; private set; } = ",";
 	public int MaxRows { get; private set; } = 25000;
 	public long MaxFileSizeBytes { get; private set; } = 10 * 1024 * 1024; // 10MB
-	public int MaxColumns { get; private set; } = 100;
+	public int MaxColumns { get; private set; } = 10;
 
 	public override void FinalizeAndValidate(ParserContext context)
 	{