Initial commit of LittleShop project (excluding large archives)

- BTCPay Server integration
- TeleBot Telegram bot
- Review system
- Admin area
- Docker deployment configuration

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

LittleShop/Data/LittleShopContext.cs

@@ -23,6 +23,7 @@ public class LittleShopContext : DbContext
     public DbSet<Customer> Customers { get; set; }
     public DbSet<CustomerMessage> CustomerMessages { get; set; }
     public DbSet<PushSubscription> PushSubscriptions { get; set; }
+    public DbSet<Review> Reviews { get; set; }
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
@@ -200,5 +201,42 @@ public class LittleShopContext : DbContext
             entity.HasIndex(e => e.SubscribedAt);
             entity.HasIndex(e => e.IsActive);
         });
+
+        // Review entity
+        modelBuilder.Entity<Review>(entity =>
+        {
+            entity.HasOne(r => r.Product)
+                  .WithMany(p => p.Reviews)
+                  .HasForeignKey(r => r.ProductId)
+                  .OnDelete(DeleteBehavior.Cascade);
+
+            entity.HasOne(r => r.Customer)
+                  .WithMany()
+                  .HasForeignKey(r => r.CustomerId)
+                  .OnDelete(DeleteBehavior.Cascade);
+
+            entity.HasOne(r => r.Order)
+                  .WithMany()
+                  .HasForeignKey(r => r.OrderId)
+                  .OnDelete(DeleteBehavior.Restrict);
+
+            entity.HasOne(r => r.ApprovedByUser)
+                  .WithMany()
+                  .HasForeignKey(r => r.ApprovedByUserId)
+                  .OnDelete(DeleteBehavior.SetNull);
+
+            // Indexes for performance
+            entity.HasIndex(e => e.ProductId);
+            entity.HasIndex(e => e.CustomerId);
+            entity.HasIndex(e => e.OrderId);
+            entity.HasIndex(e => e.Rating);
+            entity.HasIndex(e => e.IsApproved);
+            entity.HasIndex(e => e.IsActive);
+            entity.HasIndex(e => e.CreatedAt);
+            
+            // Composite indexes for common queries
+            entity.HasIndex(e => new { e.ProductId, e.IsApproved, e.IsActive });
+            entity.HasIndex(e => new { e.CustomerId, e.ProductId }).IsUnique(); // One review per customer per product
+        });
     }
 }