Derive technical requirements from PRD_SheetDoc_AI.md and the
telecom.quest deploy constraints in GITEA.md: stack (React/Vite +
FastAPI), stateless backend, four API endpoints, Traefik-labelled
docker-compose deploy, MVP limits (1000 rows x 30 cols), 6-day plan.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>