Update RegionServiceTests for the new RegionService constructor

RegionService now depends on ICurrentUserService and IScopeAccessService
for the target/budget/tax-rule/agency scope checks; update the existing
CRUD test setup to mock them accordingly.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Distribution.Tests/Services/RegionServiceTests.cs

@@ -1,4 +1,5 @@
 using Distribution.Features.Region;
+using Distribution.Infra.Authorization;
 using Distribution.Infra.UoW;
 using Distribution.Models;
 using Moq;
@@ -10,11 +11,14 @@ public class RegionServiceTests
 {
     private readonly Mock<IRegionRepository> _repo = new();
     private readonly Mock<IUnitOfWork> _uow = new();
+    private readonly Mock<ICurrentUserService> _currentUser = new();
+    private readonly Mock<IScopeAccessService> _scopeAccess = new();
     private readonly RegionService _sut;
 
     public RegionServiceTests()
     {
-        _sut = new RegionService(_repo.Object, _uow.Object);
+        _currentUser.Setup(u => u.RoleLevel).Returns(60);
+        _sut = new RegionService(_repo.Object, _uow.Object, _currentUser.Object, _scopeAccess.Object);
     }
 
     private static Region ActiveRegion(string name = "North") =>