OptionalactionsAccumulator for event actions (state delta, etc).
OptionalisolationScope tag isolating this node's events from peer scopes.
Dotted node path of the owning node (empty string for the root).
OptionalresumeResponses for resuming interrupted child nodes, keyed by interrupt id.
Deterministic run id of the owning node.
OptionalstateDeclares the keys this node may write to ctx.state and their types.
Resolved by the runner: the node's own schema, or the parent's.
Options for constructing a NodeContext.