fix: Kafka consumer poison pill causes infinite retry

VigilCareClinicalAPI/BackgroundServices/SepsisEngineService.cs

@@ -39,6 +39,8 @@ public class SepsisEngineService : BackgroundService
         _logger.LogInformation(
             "SepsisEngineService started — consumer group: sepsis-engine (qSOFA screening only)");
 
+        var guard = new PoisonPillGuard("sepsis-engine", _kafkaOptions.MaxPoisonRetries, _logger);
+
         try
         {
             while (!stoppingToken.IsCancellationRequested)
@@ -68,6 +70,7 @@ public class SepsisEngineService : BackgroundService
                             evt.EncounterId, evt.ObservationCode, evt.Value);
 
                     consumer.Commit(result);
+                    guard.OnSuccess();
                 }
                 catch (OperationCanceledException)
                 {
@@ -75,8 +78,14 @@ public class SepsisEngineService : BackgroundService
                 }
                 catch (Exception ex)
                 {
+                    if (result is not null && guard.ShouldSkip(result, ex))
+                    {
+                        consumer.Commit(result);
+                        continue;
+                    }
+
                     _logger.LogError(ex,
-                        "SepsisEngine failed on topic={Topic} offset={Offset} — not committing",
+                        "SepsisEngine failed on topic={Topic} offset={Offset} — will retry",
                         result?.Topic, result?.Offset.Value);
                     await Task.Delay(2000, stoppingToken);
                 }