refactor(dto): centralize backend schema defaults

src/data/schemas/user/credits_history_data.ts

@@ -4,11 +4,13 @@
  */
 import { z } from "zod";
 
+import { arrayOrEmpty, numberOrZero } from "../nullable-defaults";
+
 export const CreditsHistoryDataSchema = z.object({
-  records: z.array(z.record(z.string(), z.unknown())),
-  total: z.number(),
-  limit: z.number(),
-  offset: z.number(),
+  records: arrayOrEmpty(z.record(z.string(), z.unknown())),
+  total: numberOrZero,
+  limit: numberOrZero,
+  offset: numberOrZero,
 });
 
 export type CreditsHistoryDataInput = z.input<typeof CreditsHistoryDataSchema>;