Pre-fill payload for the "Configurar" dialog of an already-submitted portal.

Returns identifier fields (client_id/username/prefix/email) in plaintext so the form can pre-populate them, plus a filled/not-filled boolean per true secret — secret values are NEVER returned. Tenant-guarded by company.

When the portal is live on the brand's account, the LIVE identifiers win over our stored ones (apis_config.live_prefill): the dialog must show what is in effect, because an untouched field is posted back and a change is measured against it — and our row can be stale (one dealer's stored StandVirtual username no longer matched the live, working one).

Adds live ("ok" | "absent" | "unavailable"), secrets_live — the secrets the platform really reads back (OLX's return_token), the only ones a dealer may leave blank and still apply a change — and locked: only support can change this live portal, so the dialog says so before anything is typed. When what is live cannot be told ("unavailable"), NO stored identifier is returned: shown as if live and posted back, it would overwrite the working value.

pv_id is accepted for symmetry with the dialog but not used for lookup: a config row is keyed by (brand, portal, company), so it's resolved brand-level.