ci: add quality and security workflows

.github/workflows/code-quality.yml

@@ -0,0 +1,31 @@
+name: Code quality
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: code-quality-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  ruff:
+    name: Ruff
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v7
+
+      - name: Check for lint violations
+        uses: astral-sh/ruff-action@v4.1.0
+        with:
+          version: "0.16.0"
+          args: check --output-format=github
+
+      - name: Check formatting
+        run: ruff format --check --diff

.github/workflows/codeql.yml

@@ -0,0 +1,39 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: "23 3 * * 1"
+  workflow_dispatch:
+
+permissions:
+  actions: read
+  contents: read
+  security-events: write
+
+concurrency:
+  group: codeql-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  analyze:
+    name: Analyze Python
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v7
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: python
+          build-mode: none
+          queries: security-extended
+
+      - name: Analyze
+        uses: github/codeql-action/analyze@v4

.github/workflows/python-tests.yml

@@ -3,6 +3,14 @@ name: Python tests
 on:
   push:
   pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: python-tests-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
   test:
@@ -15,10 +23,10 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v7
         with:
           python-version: ${{ matrix.python-version }}