Add GetBotByUserIdAndNameAsync method to IBotService and BotService

- Implemented GetBotByUserIdAndNameAsync in IBotService and BotService to retrieve a bot by user ID and name.
- Updated GetUserStrategyCommandHandler to utilize the new method for fetching strategies based on user ID.
- Added corresponding method in IBotRepository and PostgreSqlBotRepository for database access.

src/Managing.Application/ManageBot/GetUserStrategyCommandHandler.cs

@@ -1,4 +1,5 @@
 using Managing.Application.Abstractions;
+using Managing.Application.Abstractions.Services;
 using Managing.Application.ManageBot.Commands;
 using Managing.Domain.Bots;
 using MediatR;
@@ -11,19 +12,28 @@ namespace Managing.Application.ManageBot
     public class GetUserStrategyCommandHandler : IRequestHandler<GetUserStrategyCommand, Bot>
     {
         private readonly IBotService _botService;
+        private readonly IUserService _userService;
 
-        public GetUserStrategyCommandHandler(IBotService botService)
+        public GetUserStrategyCommandHandler(IBotService botService, IUserService userService)
         {
             _botService = botService;
+            _userService = userService;
         }
 
         public async Task<Bot> Handle(GetUserStrategyCommand request, CancellationToken cancellationToken)
         {
-            var strategy = await _botService.GetBotByName(request.StrategyName);
+            var user = await _userService.GetUserByAgentName(request.AgentName);
+            if (user == null)
+            {
+                throw new Exception($"User with agent name {request.AgentName} not found");
+            }
+
+            var strategy = await _botService.GetBotByUserIdAndNameAsync(user.Id, request.StrategyName);
             if (strategy == null)
             {
-                throw new Exception($"Strategy with name {request.StrategyName} not found");
+                throw new Exception($"Strategy with name {request.StrategyName} not found for agent {request.AgentName}");
             }
+
             return strategy;
         }
     }