Proposal
One suggested change, with its reason and frozen evidence. Nothing until you approve it.
A proposal names one change to one thing: negate this term, raise this bid, pause this ad. It carries the reason, the evidence that triggered it, the rule that fired, and a precomputed way to undo it.
A proposal is a suggestion with a receipt attached. It moves through proposed → approved → applied → verified, and can be reversed at any point after.