[PM-17562] Add support for retries on event integrations (#5795)

* [PM-17562] Add support for retires on event integrations

* Add additional test coverage

* Fixed missing await call

* Remove debug organization id

* Respond to PR feedback

* Change NotBeforeUtc to DelayUntilDate. Adjust comments.

* Respond to PR feedback

src/Core/AdminConsole/Enums/IntegrationType.cs

@@ -7,3 +7,19 @@ public enum IntegrationType : int
     Slack = 3,
     Webhook = 4,
 }
+
+public static class IntegrationTypeExtensions
+{
+    public static string ToRoutingKey(this IntegrationType type)
+    {
+        switch (type)
+        {
+            case IntegrationType.Slack:
+                return "slack";
+            case IntegrationType.Webhook:
+                return "webhook";
+            default:
+                throw new ArgumentOutOfRangeException(nameof(type), $"Unsupported integration type: {type}");
+        }
+    }
+}