The kubernetes sandbox plugin returns no termination receipt, so the
leases of cancelled runs e08976cd (REN-837) and 144ae3bf (REN-825) were
released without one and the queued owner comments wait on
remote_cleanup forever. The controller log shows both Sandbox CRs
deleted. Write the missing receipt for exactly those leases.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>