Event emitted when the app-server requests an MCP elicitation response from the client.
@type t() :: %Codex.Events.McpElicitationRequested{ id: String.t() | integer(), message: String.t() | nil, request: map(), request_mode: String.t() | nil, server_name: String.t(), thread_id: String.t(), turn_id: String.t() | nil }