solved the pulse no-articles-shown issue by adjusting pydantic and solving version hell

Added Research paper feature, removed python slim in docker, ingested with playwrite

Fix: Newsletter subscription to use Appwrite & Audio API double-prefix bug

feat: production-ready backend with audio fixes and CORS update

chore: Backend updates and improvements

Phase 2: Appwrite Database Layer Implementation

Add GitHub Actions CI/CD for auto-sync to Hugging Face Spaces