Optimize RAG evaluation to unified single LLM call, increase timeouts, and handle 429 quota limits

chore: sync project updates

Major Chunking,Retrieval and Ranking Updates

feat: add auth-gated 3-mode workflow with admin chroma controls

Implemented Compare feature and fixed other chunking strats

Fixed Chat function bugs and internal bugs related to UI

Merge branch 'main' of https://github.com/Madhesh4124/RAG_LAB

feat: all phases complete, real backend data working

Implemented HF and Nvidia Embedding models and removed Gemini embedding

Implemented Fully Functioning Semantic and Fixed_size chunking strats with a change in RAG Pipeline

Major Bug Fixes and Implemented a Base RAG Workflow

feat: phase 4 complete, backend pipeline pending fix

fix: wire wizard to real backend API, fix routing

fix: embedding step selection and remove dims display

feat: phase 3 config wizard skeleton complete