fix plug to the store

src/Managing.Application/Bots/TradingBotBase.cs

@@ -123,7 +123,34 @@ public class TradingBotBase : ITradingBot
         {
             var grainKey = CandleHelpers.GetCandleStoreGrainKey(Account.Exchange, Config.Ticker, Config.Timeframe);
             var grain = grainFactory.GetGrain<ICandleStoreGrain>(grainKey);
-            LastCandle = await grain.GetLastCandle();
+            
+            try
+            {
+                // Add a small delay to ensure grain is fully activated
+                await Task.Delay(100);
+                LastCandle = await grain.GetLastCandle();
+            }
+            catch (InvalidOperationException ex) when (ex.Message.Contains("invalid activation"))
+            {
+                Logger.LogWarning("Grain activation failed for {GrainKey}, retrying in 1 second...", grainKey);
+                
+                // Wait a bit longer and retry once
+                await Task.Delay(1000);
+                try
+                {
+                    LastCandle = await grain.GetLastCandle();
+                }
+                catch (Exception retryEx)
+                {
+                    Logger.LogError(retryEx, "Failed to load last candle for {GrainKey} after retry", grainKey);
+                    LastCandle = null;
+                }
+            }
+            catch (Exception ex)
+            {
+                Logger.LogError(ex, "Error loading last candle for {GrainKey}", grainKey);
+                LastCandle = null;
+            }
         });
     }