test: add real-Redis integration tests (#45)

.github/workflows/ci.yml

@@ -73,8 +73,8 @@ jobs:
       - name: Install dependencies
         run: uv sync --group dev
 
-      - name: Run tests with coverage
-        run: uv run pytest --cov --cov-report=xml --cov-report=term-missing  --junitxml=junit.xml -o junit_family=legacy
+      - name: Run unit tests with coverage
+        run: uv run pytest -m "not integration" --cov --cov-report=xml --cov-report=term-missing --junitxml=junit.xml -o junit_family=legacy
 
       - name: Upload coverage to Codecov
         if: matrix.python-version == '3.14'
@@ -91,3 +91,39 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           report_type: test_results
+
+  test-integration:
+    name: Integration (${{ matrix.backend.name }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        backend:
+          - { name: redis, image: "redis:7" }
+          - { name: valkey, image: "valkey/valkey:8" }
+
+    services:
+      store:
+        image: ${{ matrix.backend.image }}
+        ports:
+          - 6379:6379
+        options: >-
+          --health-cmd "redis-cli ping"
+          --health-interval 5s
+          --health-timeout 3s
+          --health-retries 5
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+
+      - name: Set up Python
+        run: uv python install 3.13
+
+      - name: Install dependencies
+        run: uv sync --group dev
+
+      - name: Run integration tests
+        run: uv run pytest -m integration -v