selfHosted check not present in #0000 discriminator

Summary

discriminator 0000 check requires UserPremiumTypes.LIFETIME (Visionary) without checking self_hosted https://github.com/fluxerapp/fluxer/blob/refactor/packages/api/src/user/services/UserAccountSecurityService.tsx#L249

Steps to reproduce

1. Setup selfhosted instance
2. Toggle selfhosted in instance config
3. On a non-visionary account attempt to use #0000 discriminator