Added Invite, Notification and Activity

PostFundManagement.Domain/Models/Notification.cs

@@ -0,0 +1,28 @@
+namespace PostFundManagement.Domain.Models;
+
+public class Notification
+{
+    public long Id { get; set; }
+
+    public long OrganisationId { get; set; }
+
+    public Guid Recipient { get; set; }
+
+    public NotificationPlatform Platform { get; set; }
+
+    public NotificationStatus Status { get; set; }
+
+    public string? Subject { get; set; }
+
+    public string? Message { get; set; }
+
+    public string? Destination { get; set; }
+
+    public DateTime CreatedAt { get; set; }
+
+    public DateTime? SentAt { get; set; }
+
+    public DateTime? UpdatedAt { get; set; }
+
+    public string? Error { get; set; }
+}