fix(lint): Track pytest config and add ruff CI lint job

.github/workflows/validate.yml

@@ -16,3 +16,19 @@ jobs:
         uses: "hacs/action@main"
         with:
           category: "integration"
+
+  # Separate job so a lint failure is distinguishable from HACS validation
+  # failing. Runs the tracked ruff.toml; formatting is deliberately not
+  # checked here, the repository has not been reformatted.
+  lint:
+    name: "Ruff"
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: "actions/checkout@v3"
+      - uses: "actions/setup-python@v5"
+        with:
+          python-version: "3.13"
+      - name: Install ruff
+        run: pip install ruff==0.16.0
+      - name: Ruff check
+        run: ruff check .

pytest.ini

@@ -0,0 +1,15 @@
+# Pytest configuration for the sws12500 Home Assistant custom component.
+#
+# The suite is written against these settings; without them a clean clone
+# collects the async tests but never awaits them. Kept as a standalone
+# pytest.ini for the same reason the ruff config lives in ruff.toml: one
+# tool, one tracked file, no package metadata this repository does not need.
+
+[pytest]
+testpaths = tests
+
+# Most async tests carry no @pytest.mark.asyncio marker, so pytest-asyncio's
+# default strict mode would skip awaiting them. Auto mode treats every async
+# test function as an asyncio test.
+asyncio_mode = auto
+asyncio_default_fixture_loop_scope = function