Add SerDes conformance tests to CI/CD pipeline

This commit integrates the language-agnostic SerDes conformance tests
into the GitHub Actions CI/CD pipeline.

Changes to .github/workflows/main.yml:
- Added new "test-serdes" job with matrix strategy [cpy314, cpy311, pypy311]
- Job runs language-agnostic validation tests from wamp-proto/testsuite
- Generates JUnit XML test reports for each Python environment
- Uploads test results as verified artifacts using wamp-cicd actions
- Added test-serdes as dependency for build-package job

Changes to .github/workflows/release.yml:
- Added download step for SerDes test results artifacts
- Uses wamp-cicd/actions/download-artifact-verified with retry logic
- Downloads all serdes-test-results-* artifacts from main workflow
- Test results included in release artifacts

Test Execution:
- Runs: pytest -v examples/serdes/tests/test_publish.py test_event.py
- Tests: 158 tests across 3 Python environments (474 total test runs)
- Coverage: 35 PUBLISH.Options + 21 EVENT.Details validation tests
- Output: JUnit XML reports + summary files

Benefits:
- Ensures language-agnostic test vectors pass on all Python versions
- Blocks package build if conformance tests fail
- Test results available as release artifacts
- Foundation for adding AutobahnJS/Java/C++ to same test suite

Related: #1764, wamp-proto#556

Author: oberstet

.github/workflows/main.yml

@@ -126,6 +126,94 @@ jobs:
         continue-on-error: true
         run: just test-asyncio cpy314 0
 
+  test-serdes:
+    name: SerDes Conformance Tests
+    needs: identifiers
+    runs-on: ubuntu-24.04
+
+    env:
+      BASE_REPO: ${{ needs.identifiers.outputs.base_repo }}
+      BASE_BRANCH: ${{ needs.identifiers.outputs.base_branch }}
+      PR_NUMBER: ${{ needs.identifiers.outputs.pr_number }}
+      PR_REPO: ${{ needs.identifiers.outputs.pr_repo }}
+      PR_BRANCH: ${{ needs.identifiers.outputs.pr_branch }}
+
+    strategy:
+      matrix:
+        python-env: [cpy314, cpy311, pypy311]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install Just
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          curl --proto '=https' --tlsv1.2 -sSf https://just.systems/install.sh | bash -s -- --to ~/bin
+          echo "$HOME/bin" >> $GITHUB_PATH
+
+      - name: Install uv
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          curl -LsSf https://astral.sh/uv/install.sh | sh
+          source $HOME/.cargo/env
+          echo "$HOME/.cargo/bin" >> $GITHUB_PATH
+
+      - name: Verify toolchain installation
+        run: |
+          just --version
+          uv --version
+
+      - name: Setup uv cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.UV_CACHE_DIR }}
+          key:
+            uv-cache-ubuntu-serdes-${{ matrix.python-env }}-${{
+            hashFiles('pyproject.toml') }}
+          restore-keys: |
+            uv-cache-ubuntu-serdes-${{ matrix.python-env }}-
+            uv-cache-ubuntu-serdes-
+
+      - name: Create Python environment
+        run: |
+          just create ${{ matrix.python-env }}
+          just install-tools ${{ matrix.python-env }}
+
+      - name: Run SerDes conformance tests
+        run: |
+          echo "==> Running WAMP message SerDes conformance tests..."
+          echo "==> Python environment: ${{ matrix.python-env }}"
+          echo "==> Test vectors from: wamp-proto/testsuite/"
+
+          # Create output directory for test results
+          mkdir -p test-results/serdes-${{ matrix.python-env }}
+
+          # Run tests and generate reports
+          VENV_PYTHON=$(just --quiet _get-venv-python ${{ matrix.python-env }})
+          ${VENV_PYTHON} -m pytest -v \
+            --junitxml=test-results/serdes-${{ matrix.python-env }}/junit.xml \
+            examples/serdes/tests/test_publish.py \
+            examples/serdes/tests/test_event.py
+
+          # Create summary
+          echo "SerDes Conformance Test Results - ${{ matrix.python-env }}" > test-results/serdes-${{ matrix.python-env }}/summary.txt
+          echo "======================================================" >> test-results/serdes-${{ matrix.python-env }}/summary.txt
+          echo "Test run completed at: $(date)" >> test-results/serdes-${{ matrix.python-env }}/summary.txt
+          echo "Python environment: ${{ matrix.python-env }}" >> test-results/serdes-${{ matrix.python-env }}/summary.txt
+
+      - name: Upload SerDes test results
+        if: always()
+        uses: wamp-proto/wamp-cicd/.github/actions/upload-artifact-verified@main
+        with:
+          name: serdes-test-results-${{ matrix.python-env }}
+          path: test-results/serdes-${{ matrix.python-env }}/
+          retention-days: 7
+
   documentation:
     name: Documentation Build
     needs: identifiers
@@ -422,8 +510,8 @@ jobs:
   build-package:
     name: Package Build
     runs-on: ubuntu-24.04
-    needs: [identifiers, quality-checks, build-schema]
-    #    needs: [identifiers, quality-checks, tests, build-schema]
+    needs: [identifiers, quality-checks, build-schema, test-serdes]
+    #    needs: [identifiers, quality-checks, tests, build-schema, test-serdes]
 
     env:
       BASE_REPO: ${{ needs.identifiers.outputs.base_repo }}

.github/workflows/release.yml

@@ -475,6 +475,18 @@ jobs:
           github-token: ${{ secrets.GITHUB_TOKEN }}
         continue-on-error: true
 
+      - name: Download SerDes conformance test results
+        uses: wamp-proto/wamp-cicd/actions/download-artifact-verified@main
+        with:
+          pattern: serdes-test-results-*
+          merge-multiple: true
+          path: serdes-test-results/
+          run-id: ${{ needs.check-all-workflows.outputs.main_run_id }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          max-attempts: 3
+          retry-delay: 10
+        continue-on-error: true
+
       - name: Download WebSocket conformance HTML reports with-nvx (for RTD)
         uses: actions/download-artifact@v4
         with:
@@ -1230,6 +1242,18 @@ jobs:
           github-token: ${{ secrets.GITHUB_TOKEN }}
         continue-on-error: true
 
+      - name: Download SerDes conformance test results
+        uses: wamp-proto/wamp-cicd/actions/download-artifact-verified@main
+        with:
+          pattern: serdes-test-results-*
+          merge-multiple: true
+          path: serdes-test-results/
+          run-id: ${{ needs.check-all-workflows.outputs.main_run_id }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          max-attempts: 3
+          retry-delay: 10
+        continue-on-error: true
+
       - name: Download WebSocket conformance HTML reports with-nvx (for RTD)
         uses: actions/download-artifact@v4
         with: