chore: import DH V2 D5.6.4 production baseline

api-v3/src/authorization/decorators/require-permissions.decorator.ts

@@ -0,0 +1,15 @@
+import { SetMetadata } from '@nestjs/common';
+
+export const REQUIRED_PERMISSIONS_KEY = 'requiredPermissions';
+
+export function RequirePermissions(...permissions: string[]) {
+  const normalized = [
+    ...new Set(permissions.map((permission) => permission.trim()).filter(Boolean)),
+  ];
+
+  if (normalized.length === 0) {
+    throw new Error('RequirePermissions needs at least one permission code');
+  }
+
+  return SetMetadata(REQUIRED_PERMISSIONS_KEY, normalized);
+}