Withdraw an assignment notice before or after delivery
Story
End an assignment while preserving an accurate record of previously delivered and undispatched notices.
The journey distinguishes withdrawal before processing from supersession after an item is visible. It also exposes the unresolved product question about announcing an ending when the assignment itself was never announced.
Verification Boundary
The structured steps and assertions carry their own provenance and sources. Test references describe inspected assertions at the pinned commits; this examination does not claim a fresh provider or browser execution.