♻️ Better delivery service for AP

DysonNetwork.Sphere/ActivityPub/ActivityPubQueueService.cs

@@ -0,0 +1,25 @@
+using System.Text.Json;
+using DysonNetwork.Shared.Proto;
+using NATS.Client.Core;
+
+namespace DysonNetwork.Sphere.ActivityPub;
+
+public class ActivityPubQueueService(INatsConnection nats)
+{
+    public async Task EnqueueDeliveryAsync(ActivityPubDeliveryMessage message)
+    {
+        var rawMessage = GrpcTypeHelper.ConvertObjectToByteString(message).ToByteArray();
+        await nats.PublishAsync(ActivityPubDeliveryWorker.QueueName, rawMessage);
+    }
+}
+
+public class ActivityPubDeliveryMessage
+{
+    public Guid DeliveryId { get; set; }
+    public string ActivityId { get; set; } = string.Empty;
+    public string ActivityType { get; set; } = string.Empty;
+    public Dictionary<string, object> Activity { get; set; } = [];
+    public string ActorUri { get; set; } = string.Empty;
+    public string InboxUri { get; set; } = string.Empty;
+    public int CurrentRetry { get; set; } = 0;
+}