docs(wiki): timed quizzes, lifecycle rules, schema 8; fix three diagrams
- Teacher Guide, FAQ, API Reference, System Architecture: timed quizzes
now advance/end on the server timer, Next works in every mode, modules
count down, late answers are refused (#73); a completed quiz or closed
poll can't be restarted and a draft can't be stopped (#76).
- Release Notes: #73 removed from known issues; #73 and #76 under Fixed;
migrations are steps 1-8.
- Database and Migrations, Installation: schema_version 8, step 8.
- Security, System Architecture: a ";" inside sequence-diagram messages
ended the statement, so three diagrams failed to render.
Refs Kush-Kelaiya22/imPress#83
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
docs(wiki): complete imPress v2.1 wiki
24 pages, written from the repository's documentation and checked
against the code: concepts and glossary, system architecture,
protocols and mesh, installation, hardware guide, firmware build and
flash, configuration reference, administrator and teacher guides, CSV
imports, device management, firmware management and OTA, security,
troubleshooting, recovery procedures, database and migrations, API
reference, development guide, testing and CI, FAQ, release notes,
sidebar and footer. Every internal link and anchor resolves.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>