Add MasterBotUserId and MasterAgentName for copy trading support

- Introduced MasterBotUserId and MasterAgentName properties to facilitate copy trading functionality.
- Updated relevant models, controllers, and database entities to accommodate these new properties.
- Enhanced validation logic in StartCopyTradingCommandHandler to ensure proper ownership checks for master strategies.

src/Managing.Infrastructure.Database/PostgreSql/Entities/BotEntity.cs

@@ -36,4 +36,15 @@ public class BotEntity
     public decimal Fees { get; set; }
     public int LongPositionCount { get; set; }
     public int ShortPositionCount { get; set; }
+
+    /// <summary>
+    /// The user ID of the master bot's owner when this bot is for copy trading
+    /// </summary>
+    [ForeignKey("MasterBotUser")]
+    public int? MasterBotUserId { get; set; }
+
+    /// <summary>
+    /// Navigation property for the master bot's owner when this bot is for copy trading
+    /// </summary>
+    public virtual UserEntity? MasterBotUser { get; set; }
 }