up the blokcing tasks

src/Notifier/StellaOps.Notifier/StellaOps.Notifier.Worker/Observability/IChaosEngine.cs

@@ -72,7 +72,9 @@ public enum ChaosFaultType
     AuthFailure,
     Timeout,
     PartialFailure,
-    Intermittent
+    Intermittent,
+    ErrorResponse,
+    CorruptResponse
 }
 
 /// <summary>

src/Notifier/StellaOps.Notifier/StellaOps.Notifier.Worker/Observability/IChaosTestRunner.cs

@@ -115,52 +115,6 @@ public sealed record ChaosExperimentConfig
     public required string InitiatedBy { get; init; }
 }
 
-/// <summary>
-/// Types of faults that can be injected.
-/// </summary>
-public enum ChaosFaultType
-{
-    /// <summary>
-    /// Complete outage - all requests fail.
-    /// </summary>
-    Outage,
-
-    /// <summary>
-    /// Partial failure - percentage of requests fail.
-    /// </summary>
-    PartialFailure,
-
-    /// <summary>
-    /// Latency injection - requests are delayed.
-    /// </summary>
-    Latency,
-
-    /// <summary>
-    /// Intermittent failures - random failures.
-    /// </summary>
-    Intermittent,
-
-    /// <summary>
-    /// Rate limiting - throttle requests.
-    /// </summary>
-    RateLimit,
-
-    /// <summary>
-    /// Timeout - requests timeout after delay.
-    /// </summary>
-    Timeout,
-
-    /// <summary>
-    /// Error response - return specific error codes.
-    /// </summary>
-    ErrorResponse,
-
-    /// <summary>
-    /// Corrupt response - return malformed data.
-    /// </summary>
-    CorruptResponse
-}
-
 /// <summary>
 /// Configuration for fault behavior.
 /// </summary>

src/Notifier/StellaOps.Notifier/StellaOps.Notifier.Worker/Observability/IDeadLetterHandler.cs

@@ -124,6 +124,7 @@ public enum DeadLetterStatus
 /// </summary>
 public sealed record DeadLetterQuery
 {
+    public string? Id { get; init; }
     public DeadLetterReason? Reason { get; init; }
     public string? ChannelType { get; init; }
     public DeadLetterStatus? Status { get; init; }
@@ -260,6 +261,7 @@ public sealed class InMemoryDeadLetterHandler : IDeadLetterHandler
 
         if (query is not null)
         {
+            if (!string.IsNullOrWhiteSpace(query.Id)) filtered = filtered.Where(d => d.DeadLetterId == query.Id);
             if (query.Reason.HasValue) filtered = filtered.Where(d => d.Reason == query.Reason.Value);
             if (!string.IsNullOrEmpty(query.ChannelType)) filtered = filtered.Where(d => d.ChannelType == query.ChannelType);
             if (query.Status.HasValue) filtered = filtered.Where(d => d.Status == query.Status.Value);

src/Notifier/StellaOps.Notifier/StellaOps.Notifier.Worker/Observability/ObservabilityServiceExtensions.cs

@@ -1,5 +1,6 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using StellaOps.Notifier.Worker.Retention;
 
 namespace StellaOps.Notifier.Worker.Observability;
 
@@ -93,8 +94,7 @@ public static class ObservabilityServiceExtensions
         services.Configure<RetentionOptions>(
             configuration.GetSection(RetentionOptions.SectionName));
 
-        services.AddSingleton<IRetentionPolicyService, InMemoryRetentionPolicyService>();
-        services.AddHostedService<RetentionPolicyRunner>();
+        services.AddSingleton<IRetentionPolicyService, DefaultRetentionPolicyService>();
 
         return services;
     }
@@ -220,8 +220,7 @@ public sealed class ObservabilityServiceBuilder
         _services.TryAddSingleton<INotifierTracing, DefaultNotifierTracing>();
         _services.TryAddSingleton<IDeadLetterHandler, InMemoryDeadLetterHandler>();
         _services.TryAddSingleton<IChaosEngine, DefaultChaosEngine>();
-        _services.TryAddSingleton<IRetentionPolicyService, InMemoryRetentionPolicyService>();
-        _services.AddHostedService<RetentionPolicyRunner>();
+        _services.TryAddSingleton<IRetentionPolicyService, DefaultRetentionPolicyService>();
 
         return _services;
     }