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

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

feat: introduce strict uploaded only mode and enhance logging for AI generation

deploy: harden inspector + add RAGAS eval harness

- Added support for RICS survey levels (1, 2, 3) in document uploads and reports, allowing for better tier management and retrieval filtering.