docs: automatic sync from main repository
docs: update wiki to v1.9.4.0 — attendance, architecture, deployment pages - Add Home.md — entry point with v1.9.4.0 release summary and role table - Add Quick-Start.md — local dev setup with all commands - Add Architecture.md — full stack, data flow diagram for attendance - Add Attendance.md — offline queue, idempotency, CAS guard, adoption tracking - Add Authentication.md — JWT, Google OAuth, RBAC, onboarding quests - Add Study-Arena.md — AI classroom, pilot scoping, interaction_log schema - Add Deployment.md — Azure Container Apps + GitHub Actions CD - Update Database.md — add attendance/processed_operations/feature_usage tables Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>