AxEventPathRoot
type AxEventPathRoot =
| "constant"
| "correlation"
| "data"
| "envelope"
| "extensions"
| "identity"
| "trust"
| "continuation";Defined in: https://github.com/ax-llm/ax/blob/686f8ba96cf652e044cf922b67c16c8f09754a70/src/ax/event/types.ts#L271