Fix unit test build failures after logo service and pricing changes

DepositsController and GiftCertificatesController gained a required
ICompanyLogoService constructor parameter in the PDF logo fix; their
test factories were not updated and failed to compile on Jenkins.
Added Mock.Of<ICompanyLogoService>() to both factory methods and the
missing using directive to DepositsControllerTests.

PricingCalculationService now only charges oven cost for items that
have explicit coating layers (Coats collection non-empty), because
sandblast/prep-only and labor items do not go in the oven. Two tests
that tested the old "all items count toward oven fraction" logic were
updated to include a single coat entry on each item, which restores
the expected oven fraction math without changing the tested behaviour.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/PowderCoating.UnitTests/DepositsControllerTests.cs

@@ -6,6 +6,7 @@ using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
 using Moq;
+using PowderCoating.Application.Interfaces;
 using PowderCoating.Core.Entities;
 using PowderCoating.Core.Enums;
 using PowderCoating.Infrastructure.Data;
@@ -290,7 +291,8 @@ public class DepositsControllerTests
         var controller = new DepositsController(
             uow,
             userManager.Object,
-            Mock.Of<ILogger<DepositsController>>());
+            Mock.Of<ILogger<DepositsController>>(),
+            Mock.Of<ICompanyLogoService>());
 
         controller.ControllerContext = new ControllerContext
         {