Refine SpotBot token balance handling and logging

- Adjusted max dust amount threshold based on token type: increased for ETH to account for gas reserves, while maintaining a lower threshold for other tokens.
- Enhanced logging to clarify when a position is closed, indicating if the remaining balance is expected for gas reserves or if it was successfully closed.

src/Managing.Application/Bots/SpotBot.cs

@@ -1149,8 +1149,12 @@ public class SpotBot : TradingBotBase
                 _scopeFactory,
                 async exchangeService => await exchangeService.GetBalance(Account, Config.Ticker));
 
-            // Token balance should be zero or very small (dust) after closing
+            // For ETH, remaining balance is expected (gas reserve) - use higher threshold
-            var maxDustAmount = 0.0001m; // Consider amounts less than this as cleared
+            // For other tokens, very small dust amounts are acceptable
+            var maxDustAmount = Config.Ticker == Ticker.ETH 
+                ? 0.01m  // ETH: up to 0.01 ETH is acceptable (gas reserve)
+                : 0.0001m; // Other tokens: only dust amounts acceptable
+            
             if (tokenBalance is { Amount: > 0 } && tokenBalance.Amount > maxDustAmount)
             {
                 await LogWarningAsync(
@@ -1171,7 +1175,7 @@ public class SpotBot : TradingBotBase
                     $"Position: `{closedPosition.Identifier}`\n" +
                     $"Ticker: {Config.Ticker}\n" +
                     $"Token Balance: `{tokenBalance?.Amount ?? 0:F5}`\n" +
-                    $"Position successfully closed on exchange");
+                    $"{(Config.Ticker == Ticker.ETH && tokenBalance?.Amount > 0 ? "(Gas reserve - expected)" : "Position successfully closed on exchange")}");
             }
         }
         catch (Exception ex)