Add load testing job to GitHub Actions CI pipeline [FRE-4931]

plans/FRE-4931-load-testing.md

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+# FRE-4931: Load Testing Job Implementation
+
+## Overview
+Added load testing job to GitHub Actions CI pipeline for FrenoCorp.
+
+## Implementation Details
+
+### New Files Created
+
+1. **`.github/workflows/load-testing.yml`**
+   - Triggers on PR pushes to main (load-test paths)
+   - Scheduled daily at 2 AM UTC
+   - Two jobs: `load-test` and `performance-baseline`
+   - Uses Node.js 20 with caching
+
+2. **`scripts/load-test/package.json`**
+   - Load testing dependencies (k6, axios)
+   - Scripts for running tests and baseline comparison
+
+3. **`scripts/load-test/run-load-test.js`**
+   - Main load test runner
+   - Configurable concurrency and duration via environment variables
+   - Tests multiple API endpoints concurrently
+   - Reports success rate and average response time
+
+4. **`scripts/load-test/compare-baseline.js`**
+   - Compares current performance against baseline
+   - Fails PR if performance degrades beyond threshold
+   - Creates initial baseline if none exists
+
+5. **`scripts/load-test/reports/baseline.json`**
+   - Initial performance baseline
+   - Avg response time: 100ms
+   - Success rate: 99%
+
+### Environment Variables
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `API_BASE_URL` | https://api.frenocorp.com | Target API endpoint |
+| `LOAD_TEST_CONCURRENCY` | 10 | Concurrent users |
+| `LOAD_TEST_DURATION` | 60 | Test duration in seconds |
+| `BASELINE_THRESHOLD` | 0.1 | Max acceptable performance degradation (10%) |
+
+### Workflow Integration
+
+The load testing workflow:
+- Runs on PRs that modify load test files
+- Executes scheduled daily at 2 AM UTC
+- Uploads results as artifacts for 7 days
+- Compares against baseline on PRs
+- Fails if performance degrades beyond threshold
+
+## Next Steps
+
+- [ ] Add actual API endpoint definitions based on FrenoCorp API spec
+- [ ] Configure GitHub secrets for production API URL
+- [ ] Set up baseline monitoring dashboard
+- [ ] Add Slack notifications for performance regressions