Sandbox reset
Re-run the rich-sample seed against the designated demo tenant. The endpoint is guarded server-side: only the tenant whose slug matches DEMO_TENANT_SLUG(or mvnoalliance by default) is allowed to run it. Useful before a prospect demo so the data looks clean.
This wipes all telecom data (lines, billing accounts, invoices, payments) for the demo tenant and rebuilds from the seed script. Not destructive for any other tenant — the server rejects the call.