Ship personalised RAG, 10m SLA, parallel generate, and AI phase docs for HF pilot.

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

chore: update Docker configuration and application settings for improved deployment

feat: FAISS-only vector store (remove Chroma)

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

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