Fixed item creation when there is no image attached

Wallet.Data/ItemEntry.cs

@@ -15,6 +15,8 @@ public record ItemEntry
 
     public int State { get; set; } = 0;
 
+    public Guid? ImageId { get; set; }
+
     public BlobEntry? Image { get; set; }
 
     public required string Category { get; set; }

Wallet.Data/LockerContext.cs

@@ -31,11 +31,12 @@ public class WalletContext(DbContextOptions<WalletContext> options) :
             .WithOne()
             .OnDelete(DeleteBehavior.Cascade);
 
-        modelBuilder.Entity<ItemEntry>()
-            .HasOne(x => x.Image)
+        modelBuilder.Entity<ItemEntry>().
+        HasOne(i => i.Image)
             .WithOne()
-            .HasForeignKey<ItemEntry>()
-            .IsRequired(false);
+            .HasForeignKey<ItemEntry>(i => i.ImageId)
+            .IsRequired(false)
+            .OnDelete(DeleteBehavior.Restrict);
 
         modelBuilder.Entity<BlobEntry>()
             .HasKey(x => x.Id);