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;
+    }
+}

src/CMSMicroservice.Application/AppVersionCQ/Queries/GetAllAppVersions/GetAllAppVersionsQuery.cs

@@ -0,0 +1,23 @@
+namespace CMSMicroservice.Application.AppVersionCQ.Queries.GetAllAppVersions;
+
+/// <summary>
+/// Query برای دریافت همه نسخه‌های اپلیکیشن‌ها
+/// </summary>
+public record GetAllAppVersionsQuery(bool IncludeInactive = false) : IRequest<List<AppVersionItemDto>>;
+
+/// <summary>
+/// DTO برای هر آیتم نسخه اپلیکیشن
+/// </summary>
+public record AppVersionItemDto
+{
+    public long Id { get; init; }
+    public string AppName { get; init; } = string.Empty;
+    public string CurrentVersion { get; init; } = string.Empty;
+    public string MinRequiredVersion { get; init; } = string.Empty;
+    public bool RequiresFullCacheClear { get; init; }
+    public string? UpdateMessage { get; init; }
+    public string? ReleaseNotes { get; init; }
+    public bool IsActive { get; init; }
+    public DateTime Created { get; init; }
+    public DateTime? LastModified { get; init; }
+}

src/CMSMicroservice.Application/AppVersionCQ/Queries/GetAllAppVersions/GetAllAppVersionsQueryHandler.cs

@@ -0,0 +1,44 @@
+namespace CMSMicroservice.Application.AppVersionCQ.Queries.GetAllAppVersions;
+
+/// <summary>
+/// Handler برای دریافت همه نسخه‌های اپلیکیشن‌ها
+/// </summary>
+public class GetAllAppVersionsQueryHandler : IRequestHandler<GetAllAppVersionsQuery, List<AppVersionItemDto>>
+{
+    private readonly IApplicationDbContext _context;
+
+    public GetAllAppVersionsQueryHandler(IApplicationDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<List<AppVersionItemDto>> Handle(GetAllAppVersionsQuery request, CancellationToken cancellationToken)
+    {
+        var query = _context.AppVersions
+            .Where(v => !v.IsDeleted);
+
+        if (!request.IncludeInactive)
+        {
+            query = query.Where(v => v.IsActive);
+        }
+
+        var versions = await query
+            .OrderBy(v => v.AppName)
+            .Select(v => new AppVersionItemDto
+            {
+                Id = v.Id,
+                AppName = v.AppName,
+                CurrentVersion = v.CurrentVersion,
+                MinRequiredVersion = v.MinRequiredVersion,
+                RequiresFullCacheClear = v.RequiresFullCacheClear,
+                UpdateMessage = v.UpdateMessage,
+                ReleaseNotes = v.ReleaseNotes,
+                IsActive = v.IsActive,
+                Created = v.Created,
+                LastModified = v.LastModified
+            })
+            .ToListAsync(cancellationToken);
+
+        return versions;
+    }
+}

src/CMSMicroservice.Application/AppVersionCQ/Queries/GetAppVersion/GetAppVersionQuery.cs

@@ -0,0 +1,22 @@
+namespace CMSMicroservice.Application.AppVersionCQ.Queries.GetAppVersion;
+
+/// <summary>
+/// Query برای دریافت آخرین نسخه یک اپلیکیشن
+/// </summary>
+public record GetAppVersionQuery(string AppName, string? CurrentClientVersion = null) : IRequest<AppVersionDto?>;
+
+/// <summary>
+/// DTO برای اطلاعات نسخه اپلیکیشن
+/// </summary>
+public record AppVersionDto
+{
+    public bool Found { get; init; }
+    public string AppName { get; init; } = string.Empty;
+    public string CurrentVersion { get; init; } = string.Empty;
+    public string MinRequiredVersion { get; init; } = string.Empty;
+    public bool RequiresFullCacheClear { get; init; }
+    public bool RequiresUpdate { get; init; }
+    public string? UpdateMessage { get; init; }
+    public string? ReleaseNotes { get; init; }
+    public DateTime? LastUpdated { get; init; }
+}

src/CMSMicroservice.Application/AppVersionCQ/Queries/GetAppVersion/GetAppVersionQueryHandler.cs

@@ -0,0 +1,75 @@
+using CMSMicroservice.Domain.Entities.Configuration;
+
+namespace CMSMicroservice.Application.AppVersionCQ.Queries.GetAppVersion;
+
+/// <summary>
+/// Handler برای دریافت آخرین نسخه اپلیکیشن
+/// </summary>
+public class GetAppVersionQueryHandler : IRequestHandler<GetAppVersionQuery, AppVersionDto?>
+{
+    private readonly IApplicationDbContext _context;
+
+    public GetAppVersionQueryHandler(IApplicationDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<AppVersionDto?> Handle(GetAppVersionQuery request, CancellationToken cancellationToken)
+    {
+        var appVersion = await _context.AppVersions
+            .Where(v => v.AppName == request.AppName && v.IsActive && !v.IsDeleted)
+            .FirstOrDefaultAsync(cancellationToken);
+
+        if (appVersion == null)
+        {
+            return new AppVersionDto
+            {
+                Found = false,
+                AppName = request.AppName
+            };
+        }
+
+        // مقایسه ورژن کلاینت با حداقل نسخه مورد نیاز
+        bool requiresUpdate = false;
+        if (!string.IsNullOrEmpty(request.CurrentClientVersion) && !string.IsNullOrEmpty(appVersion.MinRequiredVersion))
+        {
+            requiresUpdate = CompareVersions(request.CurrentClientVersion, appVersion.MinRequiredVersion) < 0;
+        }
+
+        return new AppVersionDto
+        {
+            Found = true,
+            AppName = appVersion.AppName,
+            CurrentVersion = appVersion.CurrentVersion,
+            MinRequiredVersion = appVersion.MinRequiredVersion,
+            RequiresFullCacheClear = appVersion.RequiresFullCacheClear,
+            RequiresUpdate = requiresUpdate,
+            UpdateMessage = appVersion.UpdateMessage,
+            ReleaseNotes = appVersion.ReleaseNotes,
+            LastUpdated = appVersion.LastModified ?? appVersion.Created
+        };
+    }
+
+    /// <summary>
+    /// مقایسه دو نسخه (مثلاً 1.2.3 با 1.3.0)
+    /// برگشت: منفی = اولی کوچکتر، مثبت = اولی بزرگتر، صفر = برابر
+    /// </summary>
+    private static int CompareVersions(string version1, string version2)
+    {
+        var v1Parts = version1.Split('.').Select(s => int.TryParse(s, out var n) ? n : 0).ToArray();
+        var v2Parts = version2.Split('.').Select(s => int.TryParse(s, out var n) ? n : 0).ToArray();
+
+        var maxLen = Math.Max(v1Parts.Length, v2Parts.Length);
+        
+        for (int i = 0; i < maxLen; i++)
+        {
+            var v1 = i < v1Parts.Length ? v1Parts[i] : 0;
+            var v2 = i < v2Parts.Length ? v2Parts[i] : 0;
+            
+            if (v1 != v2)
+                return v1.CompareTo(v2);
+        }
+
+        return 0;
+    }
+}

src/CMSMicroservice.Application/Common/Interfaces/IApplicationDbContext.cs

@@ -47,6 +47,7 @@ public interface IApplicationDbContext
     DbSet<CommissionPayoutHistory> CommissionPayoutHistories { get; }
     DbSet<WorkerExecutionLog> WorkerExecutionLogs { get; }
     DbSet<DayaLoanContract> DayaLoanContracts { get; }
+    DbSet<AppVersion> AppVersions { get; }
     
     // ============= Discount Shop =============
     DbSet<DiscountProduct> DiscountProducts { get; }