#24 Add GitHub Actions CI workflow

Runs lint (ruff check + format) and tests (pytest with coverage)
on pull requests to develop and main branches.

Author: julien731

.github/workflows/ci.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on:
+  pull_request:
+    branches: [develop, main]
+
+jobs:
+  lint:
+    name: Lint & Format
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Install Ruff
+        run: pip install ruff>=0.9.0
+
+      - name: Ruff check
+        run: ruff check .
+
+      - name: Ruff format check
+        run: ruff format --check .
+
+  test:
+    name: Test & Coverage
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: pip
+
+      - name: Install dependencies
+        run: |
+          pip install --upgrade pip
+          pip install fastapi uvicorn python-multipart python-dotenv
+          pip install pytest pytest-asyncio httpx pytest-cov
+
+      - name: Run tests with coverage
+        run: pytest --cov --cov-report=term-missing --cov-fail-under=80