A minted session JWT plus the endpoint it authenticates against and its
wall-clock expiry. This is the unit cached by the RPC client and the unit a
host persists between processes (e.g. the CLI’s on-disk token cache).
Identifies the language and runtime making SDK calls. Each binding crate
(Python, Node, Ruby) constructs this and passes it through
[SdkConfig::new_with_client_info] so the SDK’s auto-generated
User-Agent reflects the actual caller, not the underlying Rust core.