feature: Observability: Prometheus Metrics and Grafana

2026-06-17 16:25:27 +08:00
parent 101040f9d9
commit df99bf3c91
22 changed files with 1462 additions and 132 deletions
@@ -51,6 +51,12 @@ public sealed class PagingWorkerService : BackgroundService
            {
                await HandlePageAsync(channel, ea, stoppingToken);
            }
+            catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
+            {
+                // Host is stopping while we were waiting for ack — requeue so restart does not false-escalate.
+                _logger.LogInformation("PagingWorker stopping — requeueing in-flight page message");
+                channel.BasicNack(ea.DeliveryTag, multiple: false, requeue: true);
+            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "PagingWorker failed — NACKing to DLQ");