K6 CI/CD Integration

# .github/workflows/k6.yml
name: Performance Tests
on:
  pull_request:
    branches: [main]

jobs:
  load-test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Start application
        run: docker compose up -d
        working-directory: ./

      - name: Wait for application
        run: |
          for i in $(seq 1 30); do
            curl -s http://localhost:3000/health && break
            sleep 2
          done

      - name: Install k6
        run: |
          sudo gpg -k
          sudo gpg --no-default-keyring --keyring /usr/share/keyrings/k6-archive-keyring.gpg \
            --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys C5AD17C747E3415A3642D57D77C6C491D6AC1D69
          echo "deb [signed-by=/usr/share/keyrings/k6-archive-keyring.gpg] https://dl.k6.io/deb stable main" \
            | sudo tee /etc/apt/sources.list.d/k6.list
          sudo apt-get update && sudo apt-get install k6

      - name: Run smoke test
        run: k6 run --out json=results/smoke.json tests/smoke.js

      - name: Run load test
        run: k6 run --out json=results/load.json tests/load.js

      - name: Upload results
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: k6-results
          path: results/
          retention-days: 14

      - name: Stop application
        if: always()
        run: docker compose down

// tests/smoke.js — fast validation
export const options = {
  vus: 1,
  duration: '30s',
  thresholds: {
    http_req_duration: ['p(95)<1000'],
    http_req_failed: ['rate<0.05'],
    checks: ['rate>0.95'],
  },
};

k6 run --out json=results.json --summary-export=summary.json test.js