[CLAUDE] Tests: fix CreateDepartmentCommand call-site (+ParentId 5th arg) — unblock deploy

Mig AddDepartmentParentId (0f44d97) thêm ParentId positional thứ 5 vào
CreateDepartmentCommand, nhưng MasterCatalogFilteredUniqueTests.cs:63 còn gọi
4-arg -> CS7036, test-gate FAIL Run #291 (deploy gated, prod nguyên = baseline).
CLAUDE.md §7 spec-change miss (build Api.csproj lẻ thay vì slnx full -> lọt tests).
Full `dotnet build SolutionErp.slnx` PASS sau fix.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/SolutionErp.Infrastructure.Tests/Application/MasterCatalogFilteredUniqueTests.cs

@@ -60,7 +60,7 @@ public class MasterCatalogFilteredUniqueTests
         // nhưng DB UNIQUE bare tính cả row đã xoá → SaveChanges sẽ ném DbUpdateException CHỪNG NÀO
         // migration chưa filter index. Đây là gotcha #57 confirmed.
         var act = async () => await new CreateDepartmentCommandHandler(db)
-            .Handle(new CreateDepartmentCommand("DUP1", "Phòng ban mới", null, null),
+            .Handle(new CreateDepartmentCommand("DUP1", "Phòng ban mới", null, null, null),
                 CancellationToken.None);
 
         await act.Should().NotThrowAsync(