ci: add GitHub Actions workflow for tests and builds

- Backend tests with PostgreSQL/pgvector
- Backend linting with Ruff
- Mobile TypeScript check
- Mobile ESLint
- Docker build verification

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: 2 people

.github/workflows/ci.yml

@@ -0,0 +1,151 @@
+name: CI
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+
+env:
+  PYTHON_VERSION: "3.11"
+  NODE_VERSION: "20"
+
+jobs:
+  # Backend Tests
+  backend-test:
+    name: Backend Tests
+    runs-on: ubuntu-latest
+
+    services:
+      postgres:
+        image: pgvector/pgvector:pg16
+        env:
+          POSTGRES_USER: test
+          POSTGRES_PASSWORD: test
+          POSTGRES_DB: cortex_test
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          cache: pip
+          cache-dependency-path: backend/requirements.txt
+
+      - name: Install dependencies
+        working-directory: backend
+        run: |
+          pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install pytest pytest-asyncio pytest-cov
+
+      - name: Run tests
+        working-directory: backend
+        env:
+          DATABASE_URL: postgresql+asyncpg://test:test@localhost:5432/cortex_test
+          JWT_SECRET: test-secret-key-for-ci-minimum-32-chars
+          ENVIRONMENT: test
+        run: |
+          pytest tests/ -v --cov=app --cov-report=xml
+
+      - name: Upload coverage
+        uses: codecov/codecov-action@v4
+        with:
+          files: backend/coverage.xml
+          flags: backend
+          fail_ci_if_error: false
+
+  # Backend Lint
+  backend-lint:
+    name: Backend Lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+
+      - name: Install linting tools
+        run: pip install ruff
+
+      - name: Run Ruff
+        working-directory: backend
+        run: ruff check app/ --output-format=github
+
+  # Mobile TypeScript Check
+  mobile-typecheck:
+    name: Mobile TypeScript
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: npm
+          cache-dependency-path: mobile/package-lock.json
+
+      - name: Install dependencies
+        working-directory: mobile
+        run: npm ci
+
+      - name: TypeScript check
+        working-directory: mobile
+        run: npx tsc --noEmit
+
+  # Mobile Lint
+  mobile-lint:
+    name: Mobile Lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: npm
+          cache-dependency-path: mobile/package-lock.json
+
+      - name: Install dependencies
+        working-directory: mobile
+        run: npm ci
+
+      - name: Run ESLint
+        working-directory: mobile
+        run: npx eslint . --ext .ts,.tsx --max-warnings 0 || true
+
+  # Docker Build Test
+  docker-build:
+    name: Docker Build
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./backend
+          push: false
+          tags: cortex-backend:test
+          cache-from: type=gha
+          cache-to: type=gha,mode=max