Adds POST /beoordeling/{id}/besluit: a Besluit enum (Goedkeuren/Afwijzen/
MeerInfoOpvragen) backed by new Aanvraag.BesluitStatus/BesluitToelichting
columns, gated by the same BeoordelingRules.CanDecide the read side's
canBesluiten flag already uses (409 on an illegal transition, 400 on a
missing required toelichting). Mappers.ToStatusDto gains the "a recorded
decision wins" branch. FE: besluit.machine.ts + besluit-form organism
(same form idiom as change-request-form), wired into the beoordeling page
behind the server's canBesluiten flag.
Completes WP-65 (65a + 65b) — verified end-to-end against a running
backend (werkvoorraad -> beoordeling -> besluit -> status reflected back).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
