Educational demo of a single node, sqlite, Datastar, CQRS app with low latency UX.

feat: zload writers can run as distinct authenticated identities master

-authkey mints per-writer signed dbugs_auth cookies with the server's key, exercising the per-identity write limiter (P0.3) the way real traffic would. Rate-limited writes (200 + 'too fast' notice) are now counted separately, and the doc notes measuring push latency from a separate idle instance at high reader counts. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>


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