chore: refactor release workflow for modular distro and upstream builds

.github/workflows/test.yml

@@ -265,3 +265,66 @@ jobs:
             .ci-runtime/${{ matrix.target.name }}/nginx-${{ matrix.nginx-version }}/logs/*.log
             .ci-runtime/${{ matrix.target.name }}/nginx-${{ matrix.nginx-version }}/nginx.conf
           if-no-files-found: ignore
+
+  distro-package-compat:
+    name: Distro package compatibility (${{ matrix.distro-image }})
+    runs-on: ubuntu-22.04
+    timeout-minutes: 90
+
+    strategy:
+      fail-fast: false
+      matrix:
+        distro-image:
+          - ubuntu:24.04
+          - debian:12
+          - debian:13
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Build package and validate against distro nginx
+        shell: bash
+        env:
+          DEB_PACKAGE_NAME: libnginx-mod-http-monitoring
+          DISTRO_IMAGE: ${{ matrix.distro-image }}
+          DOCKER_PLATFORM: linux/amd64
+          LATEST_TAG: none
+          MODULE_NAME: ngx_http_monitoring_module
+          NEXT_TAG: ci
+          NEXT_VERSION: 0.0.0
+          TARGET_ARCH: linux-x86_64
+        run: |
+          set -euo pipefail
+
+          mkdir -p "$GITHUB_WORKSPACE/.ci-distro-dist" "$GITHUB_WORKSPACE/.ci-distro-work"
+
+          docker run --rm -i \
+            --platform "$DOCKER_PLATFORM" \
+            -e DEB_PACKAGE_NAME \
+            -e DISTRO_IMAGE \
+            -e DIST_DIR=/work/.ci-distro-dist \
+            -e DOCKER_PLATFORM \
+            -e GITHUB_REF \
+            -e GITHUB_SHA \
+            -e LATEST_TAG \
+            -e MODULE_NAME \
+            -e NEXT_TAG \
+            -e NEXT_VERSION \
+            -e TARGET_ARCH \
+            -e WORK_ROOT=/work/.ci-distro-work \
+            -v "$GITHUB_WORKSPACE:/work" \
+            -w /work \
+            "$DISTRO_IMAGE" \
+            bash /work/scripts/build-distro-release.sh
+
+      - name: Upload distro compatibility artifacts
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: distro-package-compat-${{ strategy.job-index }}
+          path: |
+            .ci-distro-dist/*.deb
+            .ci-distro-dist/*.tar.gz
+            .ci-distro-dist/*.compatibility.json
+          if-no-files-found: ignore