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/Models/BotContact.cs

@@ -0,0 +1,80 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+
+namespace LittleShop.Models;
+
+/// <summary>
+/// Tracks all contacts for each bot, enabling contact recovery and migration
+/// </summary>
+public class BotContact
+{
+    [Key]
+    public Guid Id { get; set; }
+
+    // Bot Association
+    [Required]
+    public Guid BotId { get; set; }
+    public virtual Bot Bot { get; set; } = null!;
+
+    // Telegram User Information
+    [Required]
+    public long TelegramUserId { get; set; }
+
+    [StringLength(100)]
+    public string TelegramUsername { get; set; } = string.Empty;
+
+    [Required]
+    [StringLength(200)]
+    public string DisplayName { get; set; } = string.Empty;
+
+    [StringLength(50)]
+    public string FirstName { get; set; } = string.Empty;
+
+    [StringLength(50)]
+    public string LastName { get; set; } = string.Empty;
+
+    // Contact Metadata
+    public DateTime FirstContactDate { get; set; }
+    public DateTime LastContactDate { get; set; }
+    public int TotalInteractions { get; set; }
+    public string LastKnownLanguage { get; set; } = "en";
+
+    // Relationship Status
+    public ContactStatus Status { get; set; } = ContactStatus.Active;
+    public string? StatusReason { get; set; }
+
+    // Customer Link (if they've made purchases)
+    public Guid? CustomerId { get; set; }
+    public virtual Customer? Customer { get; set; }
+
+    // Recovery Information
+    public bool IsRecovered { get; set; } = false;
+    public Guid? RecoveredFromBotId { get; set; }
+    public DateTime? RecoveredAt { get; set; }
+
+    // Backup Metadata
+    public DateTime CreatedAt { get; set; }
+    public DateTime UpdatedAt { get; set; }
+    public bool IsActive { get; set; } = true;
+
+    // Additional Contact Info (encrypted/hashed)
+    [StringLength(500)]
+    public string? EncryptedContactData { get; set; } // For storing additional contact methods
+
+    // Preferences and Notes
+    [StringLength(500)]
+    public string? Preferences { get; set; } // JSON string of user preferences
+
+    [StringLength(1000)]
+    public string? Notes { get; set; } // Admin notes about this contact
+}
+
+public enum ContactStatus
+{
+    Active,
+    Inactive,
+    Blocked,
+    Migrated,
+    Lost,
+    Recovered
+}