fix(api): lazy-initialize Groq client to prevent uvicorn startup crash on missing secrets

feat(ui): upgrade to Solarized Light UI system with exact question cards and system status indicator

fix: audit-driven bug fixes and .gitignore update

Migrate to Groq API, fix recursion limit, and resolve imports

Upgraded the embedder and config.py

Fix Python 3.9 compat: replace PEP 585 lowercase generics (list[], dict[], set[], tuple[]) with typing equivalents across all runtime-evaluated code

Fix EnsembleRetriever import: use langchain.retrievers instead of langchain_classic

Fix Python 3.9 compatibility: replace PEP 604 union types with Optional

Fix network binding for FastAPI to avoid localhost resolution issues in Docker

Refactor and prepare for HuggingFace Spaces deployment

Added 3 NEW upgrades

Initial commit