Same shape as bitcoin-knots.bats and lnd.bats so the 20× release-gate
exercises electrumx through the same state matrix it uses for the other
two core apps. electrumx previously had a single TCP-port check inside
required-stack.bats; this adds destructive + cascade-destructive tiers.
10 @test cases:
* read-only: presence, valid state, TCP port (50001) reachable, no
orphan containers beyond {electrumx, archy-electrs-ui}
* destructive: stop, start, restart, TCP port recovers within 120s of
cold restart (longer than bitcoind because electrumx replays its
index against bitcoind on start)
* cascade: uninstall, reinstall (240s timeout for index rebuild)
With this suite, the three single-container core apps (bitcoin-knots,
lnd, electrumx) now have parity coverage. Multi-container stacks
(btcpay, mempool, fedimint) come next.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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