Betters Auth v1.5.6 link-account.mjs:22 rejects OAuth callbacks when the
genericOAuth provider is not in trustedProviders AND email_verified is
falsy. Adding authentik to trustedProviders bypasses this guard so OIDC
login works for TF-created users whose emails were never verified through
an authentik flow.
Co-Authored-By: Paperclip <noreply@paperclip.ing>