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/Products.cs

@@ -14,6 +14,21 @@ public class Products : BaseAuditableEntity
     public int SaleCount { get; set; }
     public int ViewCount { get; set; }
     public int RemainingCount { get; set; }
+    
+    // ============= Club Shop Fields =============
+    
+    /// <summary>
+    /// آیا این محصول فقط در فروشگاه باشگاه موجود است
+    /// </summary>
+    public bool IsClubExclusive { get; set; }
+    
+    /// <summary>
+    /// درصد تخفیف باشگاه (0 تا 100)
+    /// </summary>
+    public int ClubDiscountPercent { get; set; }
+    
+    // ============= Navigation Properties =============
+    
     //UserCarts Collection Navigation Reference
     public virtual ICollection<UserCarts> UserCartss { get; set; }
     //ProductGallerys Collection Navigation Reference