The login validator pinged `/inference/v1/models`, which Fireworks
serves from the per-account deployment registry and 500s with
`Error listing deployed models` for accounts without active
deployments. Valid `fw_…` keys were rejected during `/login`.
Switched validation to the static control-plane `List Models` API
(`GET /v1/accounts/fireworks/models?filter=supports_serverless=true&pageSize=1`),
the same endpoint discovery already uses. Authentication no longer
depends on the caller owning any deployments.
Fixes#3219
roboomp
9cb12da08c