admin roadmap trips ops and payment ops

prisma/migrations/20260518150000_add_trip_admin_cancel/migration.sql

@@ -0,0 +1,11 @@
+-- AlterTable: tambah jejak admin yang membatalkan trip (Phase 2 admin trip ops).
+-- `cancelledByAdminId` nullable — diisi hanya saat actor cancel = ADMIN
+-- (organizer cancel tidak mengisi field ini).
+ALTER TABLE "Trip" ADD COLUMN "cancelledByAdminId" TEXT;
+ALTER TABLE "Trip" ADD COLUMN "cancelledReason" TEXT;
+
+-- AddForeignKey: organizer/admin cancel terjaga referensinya kalau admin
+-- nantinya dihapus, set NULL supaya history Trip tidak rusak.
+ALTER TABLE "Trip" ADD CONSTRAINT "Trip_cancelledByAdminId_fkey"
+  FOREIGN KEY ("cancelledByAdminId") REFERENCES "User"("id")
+  ON DELETE SET NULL ON UPDATE CASCADE;