Protocol for extracting an Ltix.Registration from a custom struct.

Implement this protocol on your own registration struct so that Ltix.StorageAdapter callbacks can return your struct directly. The library calls the protocol internally to extract the Ltix.Registration it needs for JWT verification, nonce management, and OAuth token requests. Your original struct is preserved in the Ltix.LaunchContext returned after a successful launch.

defmodule MyApp.PlatformRegistration do
  defstruct [:id, :tenant_id, :issuer, :client_id,
             :auth_endpoint, :jwks_uri, :token_endpoint, :tool_jwk]

  defimpl Ltix.Registerable do
    def to_registration(reg) do
      Ltix.Registration.new(%{
        issuer: reg.issuer,
        client_id: reg.client_id,
        auth_endpoint: reg.auth_endpoint,
        jwks_uri: reg.jwks_uri,
        token_endpoint: reg.token_endpoint,
        tool_jwk: reg.tool_jwk
      })
    end
  end
end

Ltix.Registration itself implements this protocol as an identity transform, so existing code that returns %Registration{} from storage adapter callbacks continues to work.