Fix critical deployment issues: Redis connection, Ollama URL sanitization, Hugging Face provider, config validation, and enhanced error handling

Add Redis health status to the health check endpoint

Implement developer review recommendations: enhanced session management, improved error handling, and dependency updates

Fix critical LLM provider bugs, Redis config, and Streamlit null safety issues

Add conversation history display and finalize Redis integration

Finalize backend integration with chat endpoint and Redis memory

Ensure correct mounting of chat router in main API

Implement chat endpoint and integrate with main API

Implement FastAPI status endpoint and main app

Initialize project structure for AI Life Coach