Provider Catalog

List every known provider for the add-provider picker: id and name only.

Lightweight by design so the picker never lags: provider ids come from the any-llm registry and names from the bundled genai-prices dataset, so no provider SDK is imported. The autofill hints for a chosen provider come from GET /v1/providers/catalog/{provider_id}, which imports only that one SDK. Master-key gated because it is operator-facing dashboard data.