Transient Gemini credential material.
Only this type may contain provider credential headers or query parameters. Inspection exposes binding metadata and credential field names, never values; durable JSON encoding is prohibited.
Summary
Types
@type t() :: %Gemini.GovernedAuthority.SecretMaterial{ account_ref: String.t(), generation: pos_integer(), materialization_ref: String.t(), payload: %{headers: header_map(), query_params: query_params()}, provider_family: String.t() }