feat: Add CommissionCQ - Phase 5 Application Layer

Added 5 Commands and 4 Queries for commission calculation and payout system:

Commands:
- CalculateWeeklyBalances: Recursive binary tree traversal for leg balances
- CalculateWeeklyCommissionPool: Calculate ValuePerBalance from total pool
- ProcessUserPayouts: Distribute commission to users, create payout records
- RequestWithdrawal: User requests cash/diamond withdrawal
- ProcessWithdrawal: Admin approves/rejects withdrawal

Queries:
- GetWeeklyCommissionPool: Retrieve pool details
- GetUserCommissionPayouts: List payouts with filters (status, week, user)
- GetCommissionPayoutHistory: Complete audit trail
- GetUserWeeklyBalances: Show leg balances and contributions

Total: 35 files, ~1,100 lines of code
Binary tree algorithm, state machine, withdrawal system implemented

src/CMSMicroservice.Application/CommissionCQ/Queries/GetWeeklyCommissionPool/GetWeeklyCommissionPoolQuery.cs

@@ -0,0 +1,12 @@
+namespace CMSMicroservice.Application.CommissionCQ.Queries.GetWeeklyCommissionPool;
+
+/// <summary>
+/// Query برای دریافت استخر کمیسیون هفتگی
+/// </summary>
+public record GetWeeklyCommissionPoolQuery : IRequest<WeeklyCommissionPoolDto?>
+{
+    /// <summary>
+    /// شماره هفته
+    /// </summary>
+    public string WeekNumber { get; init; } = string.Empty;
+}

src/CMSMicroservice.Application/CommissionCQ/Queries/GetWeeklyCommissionPool/GetWeeklyCommissionPoolQueryHandler.cs

@@ -0,0 +1,32 @@
+namespace CMSMicroservice.Application.CommissionCQ.Queries.GetWeeklyCommissionPool;
+
+public class GetWeeklyCommissionPoolQueryHandler : IRequestHandler<GetWeeklyCommissionPoolQuery, WeeklyCommissionPoolDto?>
+{
+    private readonly IApplicationDbContext _context;
+
+    public GetWeeklyCommissionPoolQueryHandler(IApplicationDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<WeeklyCommissionPoolDto?> Handle(GetWeeklyCommissionPoolQuery request, CancellationToken cancellationToken)
+    {
+        var pool = await _context.WeeklyCommissionPools
+            .AsNoTracking()
+            .Where(x => x.WeekNumber == request.WeekNumber)
+            .Select(x => new WeeklyCommissionPoolDto
+            {
+                Id = x.Id,
+                WeekNumber = x.WeekNumber,
+                TotalPoolAmount = x.TotalPoolAmount,
+                TotalBalances = x.TotalBalances,
+                ValuePerBalance = x.ValuePerBalance,
+                IsCalculated = x.IsCalculated,
+                CalculatedAt = x.CalculatedAt,
+                Created = x.Created
+            })
+            .FirstOrDefaultAsync(cancellationToken);
+
+        return pool;
+    }
+}

src/CMSMicroservice.Application/CommissionCQ/Queries/GetWeeklyCommissionPool/GetWeeklyCommissionPoolQueryValidator.cs

@@ -0,0 +1,26 @@
+namespace CMSMicroservice.Application.CommissionCQ.Queries.GetWeeklyCommissionPool;
+
+public class GetWeeklyCommissionPoolQueryValidator : AbstractValidator<GetWeeklyCommissionPoolQuery>
+{
+    public GetWeeklyCommissionPoolQueryValidator()
+    {
+        RuleFor(x => x.WeekNumber)
+            .NotEmpty()
+            .WithMessage("شماره هفته نمی‌تواند خالی باشد")
+            .Matches(@"^\d{4}-W\d{2}$")
+            .WithMessage("فرمت شماره هفته باید YYYY-Www باشد");
+    }
+
+    public Func<object, string, Task<IEnumerable<string>>> ValidateValue => async (model, propertyName) =>
+    {
+        var result = await ValidateAsync(
+            ValidationContext<GetWeeklyCommissionPoolQuery>.CreateWithOptions(
+                (GetWeeklyCommissionPoolQuery)model,
+                x => x.IncludeProperties(propertyName)));
+
+        if (result.IsValid)
+            return Array.Empty<string>();
+
+        return result.Errors.Select(e => e.ErrorMessage);
+    };
+}

src/CMSMicroservice.Application/CommissionCQ/Queries/GetWeeklyCommissionPool/WeeklyCommissionPoolDto.cs

@@ -0,0 +1,16 @@
+namespace CMSMicroservice.Application.CommissionCQ.Queries.GetWeeklyCommissionPool;
+
+/// <summary>
+/// DTO برای استخر کمیسیون هفتگی
+/// </summary>
+public class WeeklyCommissionPoolDto
+{
+    public long Id { get; set; }
+    public string WeekNumber { get; set; } = string.Empty;
+    public long TotalPoolAmount { get; set; }
+    public long TotalBalances { get; set; }
+    public decimal ValuePerBalance { get; set; }
+    public bool IsCalculated { get; set; }
+    public DateTime? CalculatedAt { get; set; }
+    public DateTimeOffset Created { get; set; }
+}