feat: catalog read cache (api + user apps) and clearer Zarrin accounting errors

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/modules/catalog/catalog-cache.module.ts

@@ -0,0 +1,14 @@
+import { Global, Module } from '@nestjs/common';
+import { CatalogCacheService } from './catalog-cache.service';
+
+/**
+ * Global so the accounting module can invalidate the storefront catalogue
+ * without importing CatalogModule (which itself depends on the accounting
+ * module).
+ */
+@Global()
+@Module({
+  providers: [CatalogCacheService],
+  exports: [CatalogCacheService],
+})
+export class CatalogCacheModule {}