FieldScrubExecuteResponse

What the execute door's act did: a completion and a refusal are different answers, so the
response is a tagged enum. A refusal here is an operator-facing one (charter_resource,
already_erased, sentinel_collision, projection_disagrees); a caller who is not a system
admin never reaches the act.

{ "cleared": true, "event_id": "a7a26ff2-e851-45b6-9634-d595f45458b7", "field": { "family": null, "kind": "title" }, "redacted_fields": [ { "event": "1a4a8620-0119-4336-af71-a3b3e24f5ebc", "paths": [ "string" ] } ], "request_reference": "befa7ed4-201c-4983-ac08-b6179835da7c", "status": "completed" }