common: send message to subscriptions server on email confirmed

Streetwriters.Common/Clients.cs

@@ -42,6 +42,20 @@ namespace Streetwriters.Common
             PackageName = "com.streetwriters.notesnook",
             OnEmailConfirmed = async (userId) =>
             {
+                if (!Constants.IS_SELF_HOSTED)
+                {
+                    await WampServers.SubscriptionServer.PublishMessageAsync(
+                        SubscriptionServerTopics.EmailConfirmedTopic,
+                        new EmailConfirmedMessage
+                        {
+                            UserId = userId,
+                            ClientId = "notesnook",
+                            AppId = ApplicationType.NOTESNOOK,
+                            ConfirmedAt = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds()
+                        }
+                    );
+                }
+
                 await WampServers.MessengerServer.PublishMessageAsync(MessengerServerTopics.SendSSETopic, new SendSSEMessage
                 {
                     UserId = userId,

Streetwriters.Common/Messages/EmailConfirmedMessage.cs

@@ -0,0 +1,20 @@
+using System.Text.Json.Serialization;
+using Streetwriters.Common.Enums;
+
+namespace Streetwriters.Common.Messages
+{
+    public class EmailConfirmedMessage
+    {
+        [JsonPropertyName("userId")]
+        public required string UserId { get; set; }
+
+        [JsonPropertyName("clientId")]
+        public required string ClientId { get; set; }
+
+        [JsonPropertyName("appId")]
+        public ApplicationType AppId { get; set; }
+
+        [JsonPropertyName("confirmedAt")]
+        public long ConfirmedAt { get; set; }
+    }
+}

Streetwriters.Common/WampServers.cs

@@ -110,6 +110,7 @@ namespace Streetwriters.Common
         public const string CreateSubscriptionTopic = "co.streetwriters.subscriptions.create";
         public const string CreateSubscriptionV2Topic = "co.streetwriters.subscriptions.v2.create";
         public const string DeleteSubscriptionTopic = "co.streetwriters.subscriptions.delete";
+        public const string EmailConfirmedTopic = "co.streetwriters.subscriptions.email_confirmed";
     }
 
     public struct IdentityServerTopics