Fix CI: Use GitHub Actions service container for Redis

Use robust startup health checks and daemonized Redis in CI Quality Gate

Configure host-based SQLite workflow for AI Quality Gate, remove emojis from backend Python files, and add all necessary backend and agent files to the repository

Clean up repository by removing obsolete Streamlit frontend folder and rewrite README to be professional and minimal

Enable Quality Gate on push to main and configure database seeding

Configure Hugging Face Spaces Docker backend and GitHub Pages frontend CD deployment

Initial commit: LLMBench platform with Amber & Terra Cotta theme and Celery worker fixes