feat(AppVersion): Add version tracking system for frontend cache invalidation

- Add AppVersion entity with CurrentVersion, MinRequiredVersion, RequiresFullCacheClear
- Add GetAppVersion query to check app version and compare with client version
- Add GetAllAppVersions query for admin panel
- Add UpdateAppVersion command to update/create app versions
- Add appversion.proto for gRPC communication
- Add AppVersionService for gRPC endpoints
- Add database migration for AppVersions table

src/CMSMicroservice.Application/AppVersionCQ/Commands/UpdateAppVersion/UpdateAppVersionCommand.cs

@@ -0,0 +1,42 @@
+namespace CMSMicroservice.Application.AppVersionCQ.Commands.UpdateAppVersion;
+
+/// <summary>
+/// Command برای آپدیت یا ایجاد نسخه جدید اپلیکیشن
+/// </summary>
+public record UpdateAppVersionCommand : IRequest<Unit>
+{
+    /// <summary>
+    /// نام اپلیکیشن (FrontOffice, BackOffice, MobileApp)
+    /// </summary>
+    public string AppName { get; init; } = string.Empty;
+
+    /// <summary>
+    /// شماره نسخه جدید (مثلاً 1.2.3)
+    /// </summary>
+    public string CurrentVersion { get; init; } = string.Empty;
+
+    /// <summary>
+    /// حداقل نسخه مورد نیاز
+    /// </summary>
+    public string? MinRequiredVersion { get; init; }
+
+    /// <summary>
+    /// آیا کش کامل باید پاک بشه؟
+    /// </summary>
+    public bool RequiresFullCacheClear { get; init; }
+
+    /// <summary>
+    /// پیام آپدیت
+    /// </summary>
+    public string? UpdateMessage { get; init; }
+
+    /// <summary>
+    /// توضیحات تغییرات این نسخه
+    /// </summary>
+    public string? ReleaseNotes { get; init; }
+
+    /// <summary>
+    /// دلیل آپدیت (برای لاگ)
+    /// </summary>
+    public string? UpdateReason { get; init; }
+}