delivery plumbing that got us there:
- acks clear on result-recorded, not command lifecycle status (no more 34-deep recycling)
- timeouts, cancels, dropped acks/receipts, failed actions all land in history instead of dying on stdout
- one shared closure-cleared predicate so auto-confirm and manual approve can't drift
override waives the vuln call only and gets journaled; signing and hash verification stay non-negotiable.
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