feat: Add core entities and history tables for network-club system

Core Entities:
- Add SystemConfiguration for dynamic config management
- Add ClubMembership, ClubFeature, UserClubFeature for club management
- Add NetworkWeeklyBalance for binary network tracking
- Add WeeklyCommissionPool, UserCommissionPayout for commission system

History Entities (Audit Trail):
- Add ClubMembershipHistory
- Add NetworkMembershipHistory
- Add CommissionPayoutHistory
- Add SystemConfigurationHistory

Updates to Existing Entities:
- User: Add NetworkParentId, LegPosition, and navigation properties
- UserWallet: Add NetworkBalance and DiscountBalance fields
- Products: Add IsClubExclusive and ClubDiscountPercent fields
- GlobalUsings: Add new namespaces for club/network/commission entities

src/CMSMicroservice.Domain/Entities/Network/NetworkWeeklyBalance.cs

@@ -0,0 +1,52 @@
+namespace CMSMicroservice.Domain.Entities.Network;
+
+/// <summary>
+/// تعادل‌های هفتگی شبکه باینری
+/// </summary>
+public class NetworkWeeklyBalance : BaseAuditableEntity
+{
+    /// <summary>
+    /// شناسه کاربر
+    /// </summary>
+    public long UserId { get; set; }
+
+    /// <summary>
+    /// User Navigation Property
+    /// </summary>
+    public virtual User User { get; set; }
+
+    /// <summary>
+    /// شماره هفته (مثال: "2025-W48")
+    /// </summary>
+    public string WeekNumber { get; set; }
+
+    /// <summary>
+    /// تعداد تعادل شاخه چپ در این هفته
+    /// </summary>
+    public int LeftLegBalances { get; set; }
+
+    /// <summary>
+    /// تعداد تعادل شاخه راست در این هفته
+    /// </summary>
+    public int RightLegBalances { get; set; }
+
+    /// <summary>
+    /// امتیاز کاربر: MIN(LeftLegBalances, RightLegBalances)
+    /// </summary>
+    public int TotalBalances { get; set; }
+
+    /// <summary>
+    /// مبلغی که از این کاربر به استخر هفتگی اضافه شد (ریال)
+    /// </summary>
+    public long WeeklyPoolContribution { get; set; }
+
+    /// <summary>
+    /// زمان محاسبه توسط Worker
+    /// </summary>
+    public DateTime? CalculatedAt { get; set; }
+
+    /// <summary>
+    /// آیا منقضی شده (بعد از توزیع کمیسیون)
+    /// </summary>
+    public bool IsExpired { get; set; }
+}