Judge Refinement

Settle one refinement: kept, rolled back, or not yet.

TAKES NO NUMBERS FROM THE CALLER. The after-rate is measured here, over exactly the window that starts when the refinement was applied, and the verdict is reached by refinement.judge. A worker that reported its own before/after could report flattering ones, and the entire value of this ledger is that the comparison can be trusted -- so the only thing the watch pass gets to do is ask.

"Not yet" comes back as a normal body with settled: false. A young refinement having too little fresh evidence is the expected case, not a fault.