Fix null cols

NostrStreamer/Controllers/NostrController.cs

@@ -453,6 +453,8 @@ public class NostrController : Controller
             {
                 PubKey = userPubkey,
                 State = UserStreamState.Planned,
+                EdgeIp = string.Empty,
+                ForwardClientId = string.Empty
             };
             newStream.PatchStream(req.Event);
             var ev = _eventBuilder.CreateStreamEvent(newStream);

NostrStreamer/Database/UserStream.cs

@@ -54,7 +54,7 @@ public class UserStream
     public string? Thumbnail { get; set; }
 
     public Guid? EndpointId { get; set; }
-    public IngestEndpoint? Endpoint { get; init; } = null!;
+    public IngestEndpoint? Endpoint { get; init; }
 
     /// <summary>
     /// Publisher edge IP