[CLAUDE] Tests Phase 2: Code generator format + sequence tests (SQLite in-memory)

Phase 2 — chống regression code generator. 17 test mới integration với
DB thật (SQLite in-memory) tổng cộng 71 test pass < 3 giây.

Test project:
- tests/SolutionErp.Infrastructure.Tests/ (xUnit + FluentAssertions + EF SQLite 10)
- ProjectReference SolutionErp.Infrastructure (transitively get Application + Domain)
- Added vào SolutionErp.slnx

Test fixtures:
- Common/SqliteDbFixture.cs:
  - SQLite ":memory:" + shared connection + EnsureCreated() từ DbContext model
  - TestApplicationDbContext subclass — override OnModelCreating replace
    'nvarchar(max)' → 'TEXT' (SQLite không support max keyword)
  - FixedDateTime stub IDateTime cho deterministic year boundary test

Test files:
- Services/ContractCodeGeneratorTests.cs (10 test):
  - Format per ContractType (5 type × Project scope) — RG-001 spec
  - Framework HĐ (NguyenTacNCC + NguyenTacDV) → year scope thay vì project
  - Sequence increment per prefix (3 calls → /01, /02, /03)
  - Different prefixes (project / supplier) → independent sequences
  - Year change (2026 → 2027) → reset sequence vì prefix khác
  - PersistsSequenceRow LastSeq verification
- Services/PurchaseEvaluationCodeGeneratorTests.cs (7 test):
  - Format A/B (DuyetNcc → 'A', DuyetNccPhuongAn → 'B')
  - Seq là 3-digit padded (001..012)
  - Type A và B sequence độc lập trong cùng năm
  - Year boundary reset cả A và B

CI gate update (.gitea/workflows/deploy.yml):
- Step "Run integration tests (Infrastructure)" thêm sau Domain tests
- TRX log saved riêng (infra-tests.trx)
- Cả 2 step đều exit non-zero → no deploy

Verify local:
- dotnet test SolutionErp.slnx → Total tests: 71 (54 Domain + 17 Infra) / Passed: 71 / 2.1s
- dotnet build SolutionErp.slnx → 0 error

Phase 3+ pending:
- Application handler tests (CQRS) với EF InMemory hoặc SQLite (~1 ngày)
- API smoke tests qua WebApplicationFactory (~0.5 ngày)
- FE Vitest cho lib utility (~0.5 ngày)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -30,10 +30,9 @@ jobs:
           & 'C:\Program Files\nodejs\npm.cmd' --version
 
       # ============== TEST GATE ==============
-      # Run unit tests TRƯỚC build/publish/deploy. Test fail → exit non-zero
-      # → toàn bộ job stop, KHÔNG deploy. Phase 1 chỉ Domain layer (~54 test
-      # phase machine + policy registry). Mở rộng Application/Infra/Api
-      # khi có nhu cầu (xem docs/changelog/migration-todos.md).
+      # Run tests TRƯỚC build/publish/deploy. Fail → exit non-zero → no deploy.
+      # Phase 1: Domain (54 test policy state machine).
+      # Phase 2: Infrastructure (17 test code generators format/sequence/year scope).
       - name: Run unit tests (Domain)
         shell: powershell
         run: |
@@ -43,6 +42,15 @@ jobs:
             --results-directory test-results
           if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
 
+      - name: Run integration tests (Infrastructure - SQLite in-memory)
+        shell: powershell
+        run: |
+          & 'C:\Program Files\dotnet\dotnet.exe' test tests/SolutionErp.Infrastructure.Tests/SolutionErp.Infrastructure.Tests.csproj `
+            --configuration Release `
+            --logger "trx;LogFileName=infra-tests.trx" `
+            --results-directory test-results
+          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+
       - name: Upload test results
         if: always()
         continue-on-error: true   # nếu Gitea runner chưa có upload-artifact action, skip không block deploy