Fix HF startup when OPENAI_API_KEY secret is missing or only in Space env.

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

Prioritize production AI: photo vision fix, HF profile, and inspector on generate.

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

chore: update Docker configuration and application settings for improved deployment

feat: adaptive writing style — user docs first, KB fallback, few-shot examples

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

Added canonical rollout functionality, including new API endpoints and request/response models for upgrading indexed content. Updated main application to include the canonical rollout router. Introduced a new document loading function for raw documents in the ingestion pipeline. This enhances content management and semantic upgrades across the application.

- Introduced a new API endpoint for finding similar content in the tenant's workspace, allowing users to identify overlapping uploads and draft notes.

- Replaced timezone.utc with UTC from datetime for consistent datetime handling.

feat: FAISS-only vector store (remove Chroma)

- Introduced `ingest_timeout_seconds` setting in config.py to define maximum time for document ingestion.

Merge origin/experiment-lab (LangChain RAG) into experiment-lab + product features

- Updated .gitignore to exclude proprietary RICS documents.

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

fix: comprehensive codebase review fixes (critical + major + minor issues)

feat: add complete browser UI with upload, section config, generate and results views

fix: resolve startup and background task issues for Python 3.13 + Starlette 0.52

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