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; }
+}

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

@@ -0,0 +1,65 @@
+using CMSMicroservice.Domain.Entities.Configuration;
+
+namespace CMSMicroservice.Application.AppVersionCQ.Commands.UpdateAppVersion;
+
+/// <summary>
+/// Handler برای آپدیت یا ایجاد نسخه جدید اپلیکیشن
+/// </summary>
+public class UpdateAppVersionCommandHandler : IRequestHandler<UpdateAppVersionCommand, Unit>
+{
+    private readonly IApplicationDbContext _context;
+    private readonly ILogger<UpdateAppVersionCommandHandler> _logger;
+
+    public UpdateAppVersionCommandHandler(
+        IApplicationDbContext context,
+        ILogger<UpdateAppVersionCommandHandler> logger)
+    {
+        _context = context;
+        _logger = logger;
+    }
+
+    public async Task<Unit> Handle(UpdateAppVersionCommand request, CancellationToken cancellationToken)
+    {
+        // پیدا کردن نسخه موجود برای این اپ
+        var existingVersion = await _context.AppVersions
+            .Where(v => v.AppName == request.AppName && !v.IsDeleted)
+            .FirstOrDefaultAsync(cancellationToken);
+
+        if (existingVersion != null)
+        {
+            // آپدیت نسخه موجود
+            existingVersion.CurrentVersion = request.CurrentVersion;
+            existingVersion.MinRequiredVersion = request.MinRequiredVersion ?? request.CurrentVersion;
+            existingVersion.RequiresFullCacheClear = request.RequiresFullCacheClear;
+            existingVersion.UpdateMessage = request.UpdateMessage;
+            existingVersion.ReleaseNotes = request.ReleaseNotes;
+
+            _logger.LogInformation(
+                "App version updated: {AppName} v{Version}, CacheClear={CacheClear}, Reason={Reason}",
+                request.AppName, request.CurrentVersion, request.RequiresFullCacheClear, request.UpdateReason);
+        }
+        else
+        {
+            // ایجاد نسخه جدید
+            var newVersion = new AppVersion
+            {
+                AppName = request.AppName,
+                CurrentVersion = request.CurrentVersion,
+                MinRequiredVersion = request.MinRequiredVersion ?? request.CurrentVersion,
+                RequiresFullCacheClear = request.RequiresFullCacheClear,
+                UpdateMessage = request.UpdateMessage,
+                ReleaseNotes = request.ReleaseNotes,
+                IsActive = true
+            };
+
+            _context.AppVersions.Add(newVersion);
+
+            _logger.LogInformation(
+                "New app version created: {AppName} v{Version}, CacheClear={CacheClear}, Reason={Reason}",
+                request.AppName, request.CurrentVersion, request.RequiresFullCacheClear, request.UpdateReason);
+        }
+
+        await _context.SaveChangesAsync(cancellationToken);
+        return Unit.Value;
+    }
+}