- Add manual CI trigger 'force-update-ghost' for updating all posts
- Support FORCE_UPDATE environment variable in Rust code
- Implement post update logic via Ghost API PUT requests
- Add get_existing_post_id() function to find existing posts
- Update README with usage instructions
- Enhanced validation script to test new functionality
Usage:
- Normal: Only syncs new posts (default behavior)
- Force: FORCE_UPDATE=true updates ALL posts including existing ones
- Create validation script to verify implementation
- Add test file for ghost profile rendering
- Validate all components work together correctly
- Ready for CI/CD pipeline testing
