CngxCommitRunner

Description#

Action runner contract. Receives the controller's success/error routes and returns a cancel handle. The runner is opaque to the controller — it can wrap any async source (Observable, Promise, sync value) and any cancellation primitive.

Variants supply their own runner adapter (e.g. select's runCommitAction invokes a CngxSelectCommitAction<T>; stepper's runner adapts a CngxStepperCommitAction); the controller has no knowledge of the variant-specific action shape.