- Added initial feature flag state verification before tests to ensure a stable starting point.
- Implemented retry logic with exponential backoff for toggling feature flags, improving resilience against transient failures.
- Introduced `waitForFeatureFlagPropagation` utility to replace hard-coded waits with condition-based verification for feature flag states.
- Added advanced test scenarios for handling concurrent toggle operations and retrying on network failures.
- Updated existing tests to utilize the new retry and propagation utilities for better reliability and maintainability.
Complete documentation overhaul for DNS Challenge Support feature (PR #461):
Rewrite features.md as marketing overview (87% reduction: 1,952 → 249 lines)
Organize features into 8 logical categories with "Learn More" links
Add comprehensive dns-challenge.md with:
15+ supported DNS providers (Cloudflare, Route53, DigitalOcean, etc.)
Step-by-step setup guides
Provider-specific configuration
Manual DNS challenge workflow
Troubleshooting section
Create 18 feature documentation stub pages
Update README.md with DNS Challenge in Top Features section
Refs: #21, #461