Fix copilot instructions violations: add frontmatter to include file and update ms.date

Co-authored-by: wadepickett <[email protected]>

Author: Copilot

aspnetcore/includes/validation-package-net10.md

@@ -1,3 +1,10 @@
+---
+title: .NET 10 validation package information
+ai-usage: ai-assisted
+ms.author: wpickett
+ms.date: 08/28/2025
+---
+
 <!-- USED in validation docs for .NET 10 -->
 
 ## Validation in .NET 10
@@ -16,6 +23,6 @@ To use the `Microsoft.Extensions.Validation` APIs:
 
 * Register validation services with dependency injection:
 
-```csharp
-builder.Services.AddValidation();
-```
+    ```csharp
+    builder.Services.AddValidation();
+    ```

aspnetcore/mvc/models/validation.md

@@ -5,7 +5,7 @@ description: Learn about model validation in ASP.NET Core MVC and Razor Pages.
 monikerRange: '>= aspnetcore-3.1'
 ms.author: tdykstra
 ms.custom: mvc
-ms.date: 05/7/2023
+ms.date: 08/28/2025
 uid: mvc/models/validation
 ---
 # Model validation in ASP.NET Core MVC and Razor Pages

aspnetcore/tutorials/razor-pages/validation.md

@@ -3,7 +3,7 @@ title: Part 8, add validation
 author: wadepickett
 description: Part 8 of tutorial series on Razor Pages.
 ms.author: wpickett
-ms.date: 06/23/2024
+ms.date: 08/28/2025
 uid: tutorials/razor-pages/validation
 ---
 # Part 8 of tutorial series on Razor Pages