F4: ReissueCredentials — explicit operator recovery for consumed-password
dead-ends; resets the labelled resource's password (exactly-1 guard,
red-proofed), stores a fresh one-time secret, bumps ConfigVersion.
New hetznerapi.ResetBoxPassword for the dedicated path.
F2: host-key scan retry-with-backoff (~60s ladder, red-proofed) — first
save survives fresh-subaccount DNS lag.
F5: config form disables submits + shows an in-flight notice (the re-click
bait that caused live F1).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PSK5g6qYLknKj8u3QAFEr6