- Move the disabled-ack guard above the debounce so we don't stamp
_busy_ack_ts[session_key] when no ack was actually sent. Harmless
(never read when disabled) but cosmetically off.
- Document display.busy_ack_enabled in user-guide/messaging/index.md
and HERMES_GATEWAY_BUSY_ACK_ENABLED in reference/environment-variables.md.
- Add JezzaHehn to scripts/release.py AUTHOR_MAP for contributor credit.
Follow-up to #17491 (Jezza Hehn).