mempool-api exits at startup while electrumx is catching up to the daemon
(7-day initial-sync ETA on .228), flapping through 'activating' for ~2 min
after each lifecycle cycle before systemd heals it. The instant asserts
probed inside that window both iterations. Poll up to 180s for
converges-to-active — a genuine crash-loop still fails.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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