A failed self-check returned the address to the queue and freed the
validator in the database, but left the floating IP attached to the
validator's port. Every later association on that port then failed with
409 ("fixed IP already has a floating IP"), so one failed self-check
poisoned a validator for good; on 2026-10-01 all 20 validators were
poisoned within 23 minutes after ifconfig.me timeouts.
SelfCheckResult now disassociates the floating IP before requeueing, and
ignores a late failed report for an address the validator no longer
holds (it could belong to another validator by then).
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
ayurishchevandClaude Sonnet 5.5
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