Implemented centralised audit logging

PostFundManagement.Domain/Entities/Notification.cs

@@ -5,6 +5,8 @@ namespace PostFundManagement.Domain.Entities;
 [EntityTypeConfiguration<NotificationConfiguration, Notification>]
 public class Notification : Models.Notification
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Organisation? Organisation { get; set; }
 
     public virtual User? RecipientUser { get; set; }
@@ -22,6 +24,7 @@ public sealed class NotificationConfiguration : IEntityTypeConfiguration<Notific
         builder.Property(f => f.SentAt).IsRequired(false);
         builder.Property(f => f.Recipient).IsRequired();
         builder.Property(f => f.OrganisationId).IsRequired();
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.Platform).IsRequired().HasConversion<int>().HasDefaultValueSql("1")
             .HasSentinel(NotificationPlatform.Email);
         builder.Property(f => f.Status).IsRequired().HasConversion<int>().HasDefaultValueSql("1")
@@ -31,6 +34,12 @@ public sealed class NotificationConfiguration : IEntityTypeConfiguration<Notific
         builder.Property(f => f.Destination).IsRequired().HasMaxLength(LabelLength);
         builder.Property(f => f.Error).IsRequired(false);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.Restrict);
+
         builder.HasOne(f => f.Organisation)
             .WithMany()
             .HasForeignKey(fk => fk.OrganisationId)