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- Edge/UX dashboard: aggregate request-rate vs rejection-rate panel (gateway_rate_limited_total by class; no per-user labels). - ARCHITECTURE §2/§11/§12/§13: body cap + explicit h2c sizing, the rate-limit observability pipeline and auto-flag policy, the admin-limiter note (and the caddy-path gap), the landing container topology; fixed the stale 120/min per-user figure. - FUNCTIONAL (+_ru): the Throttled view and the reversible high-rate flag. - gateway/backend/deploy READMEs, TESTING.md, root CLAUDE.md updated. - PRERELEASE.md: R3 interview decisions + implementation refinements logged; tracker R3 -> done (this PR implements it; CI gates the merge).