createMaintenanceRecord() opens a record and flips AssetItem.status to
"repair" inside one transaction, rejecting on missing/retired AssetItem,
an active Assignment, or an already-open record for the same item.
closeMaintenanceRecord() sets endDate/resolutionNotes and applies a
caller-supplied targetStatus (never defaulted) to the AssetItem, guarding
double-close and endDate>=startDate. Mirrors src/lib/assignments.ts's
Zod-validate + $transaction + WHERE-guarded updateMany race-closing pattern.
toanhoang
67fe335e76