Move the backoff spawn operation into a named async helper so older tooling does not trip over || async syntax, and add a jail sudo wrapping unit test. Document sudo as an interim validated-host privilege mode.\n\nValidation: ./scripts/check-format.sh; cargo fmt --check; cargo check -p colibri-daemon; cargo test -p colibri-daemon jail_tests -- --nocapture.
Uses 'sudo -n' to wrap jail commands. Set via
COLIBRI_JAIL_PRIV_MODE=sudo. Requires sudoers entry:
clawdie ALL=(root) NOPASSWD: /usr/sbin/jexec *
The daemon's async spawn closure (edition 2015) may need a
follow-up to fully use this mode — the env var and wrapping
logic are correct, verified via manual jexec test.