Completes the bug class from #83906 — the same blocking fsync-on-event-loop
pattern existed in two more async gateway paths:
- slash_commands.py _handle_restart_command: two atomic_json_write calls
for .restart_notify.json and .restart_last_processed.json were blocking
on fsync inside an async function. Now offloaded via asyncio.to_thread.
- run.py _clear_restart_failure_count: called from
_handle_message_with_agent (async, per-turn path) after a successful
agent turn. Made the method async and offloaded the atomic_json_write
call via asyncio.to_thread. Caller updated to await.
Shutdown-path calls in _stop_impl_body (_increment_restart_failure_counts,
planned restart notification marker) are intentionally left synchronous —
the event loop is draining/stopping and offloading adds complexity for no
benefit.
kshitij
48c233d503