Configure BTCPay with external nodes via Tor

- Set up Tor container for SOCKS proxy (port 9050)
- Configured Monero wallet with remote onion node
- Bitcoin node continues syncing in background (60% complete)
- Created documentation for wallet configuration steps
- All external connections routed through Tor for privacy

BTCPay requires manual wallet configuration through web interface:
- Bitcoin: Need to add xpub/zpub for watch-only wallet
- Monero: Need to add address and view key

System ready for payment acceptance once wallets configured.

LittleShop.Client/Models/Product.cs

@@ -12,6 +12,7 @@ public class Product
     public string? CategoryName { get; set; }
     public bool IsActive { get; set; }
     public List<ProductPhoto> Photos { get; set; } = new();
+    public List<ProductVariation> Variations { get; set; } = new();
     public DateTime CreatedAt { get; set; }
     public DateTime UpdatedAt { get; set; }
 }
@@ -22,4 +23,17 @@ public class ProductPhoto
     public string Url { get; set; } = string.Empty;
     public string? AltText { get; set; }
     public int SortOrder { get; set; }
+}
+
+public class ProductVariation
+{
+    public Guid Id { get; set; }
+    public Guid ProductId { get; set; }
+    public string Name { get; set; } = string.Empty;
+    public string? Description { get; set; }
+    public int Quantity { get; set; }
+    public decimal Price { get; set; }
+    public decimal PricePerUnit { get; set; }
+    public int SortOrder { get; set; }
+    public bool IsActive { get; set; }
 }