CRITICAL FIX: This endpoint previously allowed unauthenticated users to
trigger service restarts, which is a denial-of-service vulnerability.
Now requires:
- Authentication (CheckAuth) when auth is configured
- Admin role for proxy auth users
- settings:write scope for API tokens
Initial setup (no auth configured yet) remains accessible to allow
first-time security configuration to trigger restart.
rcourtman
fdc99418d6