Deploy v2 backend to Hugging Face Spaces.

Disable LLM RAG sanitisation by default on HF Spaces to fix slow ingestion.

feat: async pipeline, job queue, generation hardening, and docs

chore: update Docker configuration and application settings for improved deployment

- Updated `.env.example` to include new settings for bulk upload limits and batch processing.

feat: scaffold complete RAG system for RICS-style report generation