thptqg2017/docs

Docs

• project-overview.md — goal, scope, constraints, the datasets, history
• system-architecture.md — data flow, the download and how it is kept, canonical schema, routing, how one frontend serves both exam years
• data-pipeline.md — Excel parse quirks, per-dataset formats, overflow-sheet gotcha, expected row counts, verifying a rebuild
• deployment-guide.md — GitHub Pages workflow, what the databases publish as, adding a dataset, rollback, troubleshooting