Improve error handling for Garmin activity updates

Wrapped Garmin activity update in a try-catch block to log errors and throw an InvalidDataException on failure. Also fixed a minor formatting issue in the assignment of activitySummary.

Author: Andrii Bondarchuk

src/FitSyncHub.Functions/Functions/SyncIntervalsICUWithGarminHttpTriggerFunction.cs

@@ -101,7 +101,7 @@ public async Task<IActionResult> Run(
             }
 
             activitySummary
-                = await UpdateActivitiesWithNewTssAndReturnSummary(activities, pairedEvent, cancellationToken);
+            = await UpdateActivitiesWithNewTssAndReturnSummary(activities, pairedEvent, cancellationToken);
         }
 
         var garminActivity = await UpdateGarminSummaryWithIntervalsData(date, activitySummary, cancellationToken);
@@ -348,7 +348,16 @@ private static List<IntervalsIcuActivityWithNewTss> CalculateNewTssForActivities
         };
 
         _logger.LogInformation("Updating garmin activity with Id = {Id}", activityId);
-        await _garminConnectHttpClient.UpdateActivity(updateModel, cancellationToken);
+        try
+        {
+            await _garminConnectHttpClient.UpdateActivity(updateModel, cancellationToken);
+        }
+        catch (Exception)
+        {
+            _logger.LogError("Failed to update garmin activity with Id = {Id}", activityId);
+            throw new InvalidDataException($"Can not update garmin activity");
+        }
+
         _logger.LogInformation("Updated garmin activity with Id = {Id}", activityId);
 
         return await _garminConnectHttpClient.GetActivity(activityId, cancellationToken);