Zod v4 generator should emit top-level string format schemas instead of deprecated string methods

[quick007]

Description

When generating Zod schemas for OpenAPI string formats with Zod v4, Orval currently emits legacy/deprecated string method syntax such as zod.string().uuid().

In Zod v4, string format validators were moved to top-level APIs. The old method forms still work, but Zod documents them as deprecated/legacy.

This causes projects using Zod v4 to get deprecation warnings from generated code, which users cannot cleanly fix without post-processing Orval output or maintaining a custom generator patch.

Output client

zod

Configuration (orval.config)

import { defineConfig } from "orval";

export default defineConfig({
  xxxx: {
    input: "https://localhost:5000/openapi/v1.json",
    output: {
      target: "./xxxx.ts",
      client: "react-query",
      httpClient: "fetch",
      baseUrl: {
        runtime: "env.VITE_API_BASE_URL",
        imports: [{ name: "env", importPath: "../env" }],
      },
      override: {
        fetch: {
          includeHttpResponseReturnType: false,
        },
      },
    },
  },
  xxx: {
    input: "https://localhost:5000/openapi/v1.json",
    output: {
      target: "./xxx.ts",
      client: "zod",
    },
  },
});

Environment

Run the command above and paste the output here.

Expected behavior

When the generated target is Zod v4, Orval should emit modern top-level format APIs where available.

For example:

export const example = zod.object({
  id: zod.uuid(),
  createdAt: zod.iso.datetime(),
});

Zod v3 generation can keep the current method-chain output, for example zod.string().uuid().

Actual behavior

Orval generates deprecated/legacy Zod v4 string method syntax, for example:

zod.string().uuid()
zod.string().datetime()

OpenAPI document (minimal, if applicable)

openapi: 3.0.3
info:
  title: Demo
  version: 0.0.0
paths: {}
components:
  schemas:
    Example:
      type: object
      properties:
        id:
          type: string
          format: uuid
        createdAt:
          type: string
          format: date-time

Additional context

Zod v4 migration guide: https://zod.dev/v4/changelog?id=drops-symbol-support

The guide documents that string format APIs such as z.email(), z.uuid(), and z.url() are now top-level APIs. Method forms like z.string().email() still exist for compatibility but are deprecated/legacy