docs(wiki): update operations diagnostics, backup recovery, and capacity benchmarks
docs(wiki): clarify bilingual guides and document AI pause and budgets
docs(wiki): document sandbox syscall filtering and judge self-tests
docs(wiki): document reproducible judging, result history and exact counts
docs(wiki): document judge draining, capabilities and memory admission
docs(wiki): document durable judge queue and upgrade compatibility
docs(wiki): document two-factor sign-in and judge runtime upgrades
docs: document community features, detail previews and safe storage upgrades
docs: update install paths and judge capacity documentation
docs: document live registration controls and dynamic site branding
docs: document registration approval, review permissions, and upgrades