ci: add github actions for tests, coverage, and secret scanning (#15)

.github/workflows/ci.yml

@@ -0,0 +1,54 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    services:
+      postgres:
+        image: pgvector/pgvector:pg16
+        env:
+          POSTGRES_USER: ci
+          POSTGRES_PASSWORD: ci
+          POSTGRES_DB: test
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd "pg_isready -U ci"
+          --health-interval 5s
+          --health-timeout 5s
+          --health-retries 10
+
+    env:
+      TEST_DATABASE_URL: postgresql+psycopg://ci:ci@localhost:5432/test
+      JWT_SECRET_KEY: test-secret-test-secret-test-secret-123
+      GEMINI_API_KEY: test-key
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+          cache: "pip"
+
+      - name: Install dependencies
+        run: |
+          pip install -r requirements.txt
+          pip install -r requirements-dev.txt
+
+      - name: Run tests with coverage
+        run: pytest -q --cov=app --cov-fail-under=85
+
+  secrets:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: gitleaks/gitleaks-action@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}