ci: GitHub Actions — pytest + 90%+ branch coverage gate

- Trigger: push/PR to master
- Python 3.10, pip cache via actions/cache@v4
- pip install -e ".[dev]" + requirements.txt
- pytest with --cov-fail-under=90
- Coverage report: term-missing + HTML + XML

.github/workflows/test.yml

@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+    branches: ["main", "master"]
+  pull_request:
+    branches: ["main", "master"]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+
+      - name: Cache pip
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt', 'pyproject.toml') }}
+          restore-keys: ${{ runner.os }}-pip-
+
+      - name: Install dependencies
+        run: |
+          pip install --upgrade pip
+          pip install -e ".[dev]"
+          pip install -r requirements.txt
+
+      - name: Run tests
+        run: pytest