A dashboard for the engine
SQE already tracked every query and worker in memory, but there was no way to look at it without tailing logs or wiring Grafana. So we put a read-only dashboard on the health port: no login, no build step, no external assets. One HTML page over a small JSON API, with a tiny in-memory sampler so the charts move over time. Here is how it is built and why it stays deliberately small.
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