Implement hierarchical multi-model conversation architecture with HF as authoritative layer

Adjust Redis connection logic for SSL-first approach, add Hugging Face provider debugging, and update requirements

Fix Redis SSL connection issues and Hugging Face provider deprecated parameters

Fix critical issues: Redis host/port parsing, Ollama URL sanitization, and Hugging Face provider initialization

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

Implement Core LLM Factory Module with provider abstraction and factory pattern