Add performance for price reminder

src/Managing.Application/Grains/PriceFetcher15MinGrain.cs

@@ -56,7 +56,7 @@ public class PriceFetcher15MinGrain : Grain, IPriceFetcher15MinGrain, IRemindabl
         await this.RegisterOrUpdateReminder(
             FetchPricesReminderName,
             TimeSpan.FromSeconds(5),
-            TimeSpan.FromMinutes(5));
+            TimeSpan.FromMinutes(7.5));
 
         await base.OnActivateAsync(cancellationToken);
     }
@@ -184,12 +184,19 @@ public class PriceFetcher15MinGrain : Grain, IPriceFetcher15MinGrain, IRemindabl
     {
         if (_timer != null) return;
 
+        // Calculate the next execution time aligned to X-minute boundaries
+        var now = DateTime.UtcNow;
+        var dueTime = CandleHelpers.GetDueTimeForTimeframe(TargetTimeframe, now);
+        var period = TimeSpan.FromSeconds(CandleHelpers.GetBaseIntervalInSeconds(TargetTimeframe));
+        _logger.LogInformation("{0} next execution scheduled in {1} seconds and at {2:} UTC every {3} seconds",
+            nameof(PriceFetcher15MinGrain), dueTime, now.Add(dueTime), period);
+
         _timer = this.RegisterGrainTimer(
             async _ => await FetchAndPublishPricesAsync(),
             new GrainTimerCreationOptions
             {
-                Period = TimeSpan.FromMinutes(15),
-                DueTime = TimeSpan.FromSeconds(1),
+                Period = period,
+                DueTime = dueTime,
                 KeepAlive = true
             });
 
@@ -216,7 +223,7 @@ public class PriceFetcher15MinGrain : Grain, IPriceFetcher15MinGrain, IRemindabl
                 RegisterAndStartTimer();
             }
         }
-        
+
         return Task.CompletedTask;
     }
 }