Task T3.4: OutboundService gains a per-tenant egress cap (tenantLimit/tenantWindowMs,
IIOS_TENANT_OUTBOUND_*) counting a scope's commands in the window — a noisy tenant
is RATE_LIMITED while others keep sending (noisy-neighbor protection). Persists
scopeId on every command (fixes the previously-unscoped table). resolveScope assigns
IiosScope.cellId (IIOS_CELL_ID, default cell-default) — the cell-partition hook.
Tests: per-tenant cap isolates tenants; new scopes carry a cellId.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
maaz519
e7b8845c8a