Expose cache status in /health (deploy verification + ops signal)

Redis caching (in-container) for chats/messages/documents/memories with invalidation

Supabase Storage for raw uploaded files (gated, local fallback) + signed download endpoint

Supabase migration: Postgres engine (psycopg2) + pgvector vector store with Chroma fallback

Backend: temperature + persona (system_prompt) in chat; DOCX/CSV document loaders

Switch chat to Groq (fast+free), embeddings to local CPU; drop Ollama from image

Nexus Memory backend on HF Spaces (Docker + Ollama)