fix(backend): add missing domain foreign keys

backend/src/Socialize.Api/Modules/Workspaces/Data/WorkspaceModelConfiguration.cs

@@ -41,6 +41,10 @@ internal static class WorkspaceModelConfiguration
                 .HasDefaultValueSql("CURRENT_TIMESTAMP");
             workspaceInvite.HasIndex(x => x.WorkspaceId);
             workspaceInvite.HasIndex(x => new { x.WorkspaceId, x.Email, x.Status });
+            workspaceInvite.HasOne<Workspace>()
+                .WithMany()
+                .HasForeignKey(x => x.WorkspaceId)
+                .OnDelete(DeleteBehavior.Restrict);
         });
 
         return modelBuilder;