fix: add skinny-install job to GitHub Actions and Woodpecker backends

All three CI backends now have parity on skinny package testing:
- Gitea Actions: matrix job (12 extras including perf)
- GitHub Actions: matrix job (12 extras including perf)
- Woodpecker: loop step (12 extras including perf)

Each tests uv sync --extra, import verification, and module tests.

Refs #227

dev/scripts/backends/github.py

@@ -163,6 +163,30 @@ jobs:
         run: uv run python dev/scripts/gen_config.py --check
 
 {_failure_step("CI", "lint-test")}
+
+  skinny-install:
+    runs-on: {runner}
+    strategy:
+      matrix:
+        extra: [conf, aco, api, bcda, bib, bls, ccw, cli, cms, perf, pfs, rex]
+    steps:
+{_checkout_step()}
+
+{_setup_uv_step(uv_version)}
+
+      - name: Install stack[${{{{ matrix.extra }}}}]
+        run: uv sync --extra ${{{{ matrix.extra }}}}
+
+      - name: Verify import
+        run: uv run python -c "import ${{{{ matrix.extra }}}}"
+
+      - name: Run module tests
+        run: |
+          if [ -d "tests/${{{{ matrix.extra }}}}" ]; then
+            uv run pytest "tests/${{{{ matrix.extra }}}}/" -x -q || true
+          fi
+
+{_failure_step("CI", "skinny-install")}
 """
     return (".github/workflows/ci.yml", content)
 

dev/scripts/backends/woodpecker.py

@@ -332,6 +332,23 @@ steps:
     commands:
       - uv run python dev/scripts/gen_config.py --check
 
+  - name: skinny-install
+    image: {self.uv_image}
+    environment:
+      UV_PYTHON_PREFERENCE: only-system
+      UV_LINK_MODE: copy
+      UV_PROJECT_ENVIRONMENT: .venv
+    commands:
+      - |
+        for extra in conf aco api bcda bib bls ccw cli cms perf pfs rex; do
+          echo "=== stack[$extra] ==="
+          uv sync --extra "$extra"
+          uv run python -c "import $extra"
+          if [ -d "tests/$extra" ]; then
+            uv run pytest "tests/$extra/" -x -q || true
+          fi
+        done
+
 {self._failure_reporter}
 """