S" Hera" KILL called vm_physics_retire(hera_id) before capsule_vm_kill()'s
own Hera guard ever ran. Hera's self-referential parent_vm_id makes
vm_physics_find_root_id() return her own id immediately, so
vm_physics_retire() treated her as an unreachable root and zeroed the
fleet's entire execution_heat_q48 sum -- silently, with only the
harmless-looking "cannot kill Hera" message as output. Guard the retire
call the same way capsule_vm_kill() already guards the actual kill.
Three-arch acceptance boot, all clean to ok>:
logs/20260813-083429/amd64, logs/20260813-083551/aarch64,
logs/20260813-083738/riscv64.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
