OptionalComponentComponentID that now holds the spec.
OptionalContributionContribution row the user can now reference — panel applies only.
OptionalKind'form' for a whole-form override, 'contribution' for a single form panel.
OptionalMessageOptionalModeMode the server ran: 'create' / 'modify-new-version' / 'modify-in-place'.
OptionalOverrideOverrideID the user can now reference.
OptionalVersionVersion string (e.g. '1.0.0' for create, '1.1.0' for modify-new).
Result of an apply attempt — surfaced to the caller for any post-apply UI.