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.Api/Models/Responses/TradingBotResponse.cs

@@ -81,5 +81,10 @@ namespace Managing.Api.Models.Responses
         /// </summary>
         [Required]
         public Ticker Ticker { get; set; }
+
+        /// <summary>
+        /// The agent name of the master bot's owner (for copy trading bots)
+        /// </summary>
+        public string MasterAgentName { get; set; }
     }
 }