getJourneyEnvironment

Resolve the environment variables referenced by this journey: the environment-backed datasources declared in its steps, whether they source a block's options or supply the value an attached validation rule compares against, answered per datasource id; and the variables its logic conditions read, keyed by variable key (variables / variableErrors). Only browser-safe value types are returned; validation-rule values additionally exclude Map. Accepts either the public journey access token bound to this journey, or the caller's own portal (ECP) or epilot user token. A PRIVATE journey is served only to a portal or user token permitted to view it, the same rule getJourney applies.