fix(openapi): generate complete client schemas

[ctlaltlaltc]

Problem

POST /api/admin/settings/model/create generated modelData: null because zod-openapi cannot introspect the previous z.unknown().pipe(...) schema. Other dynamic, multipart, and empty admin schemas had the same client-generation failure mode.

Changes

• model creation now uses the real strict discriminated union, so modelData is emitted as typed oneOf branches
• dynamic JSON/object fields declare valid OpenAPI 3.1 shapes without changing their runtime acceptance semantics
• multipart file fields emit type: string and format: binary
• empty requests/responses are omitted; successful mutation handlers return no business payload
• admin request/response types are exported from shared Zod contracts and aligned with Pro runtime routes
• added generated-document regression coverage to reject typeless schema nodes

Companion runtime PR: labring/fastgpt-pro#1158

Verification

• targeted OpenAPI tests: 6 files, 28 tests passed
• changed-file ESLint passed in FastGPT and fastgpt-pro
• existing GitHub checks on the previous head were all green; checks for this head are pending
• app/admin typecheck reports only existing dependency and SDK-version baseline errors, with no diagnostics in changed files

[github-actions]

✅ Admin Preview Image Ready!

ghcr.io/labring/fastgpt-pr:admin_9c6f32ad9eae0a83386ce35e69d187fdc90a092c

🕒 Time: 2026-09-22 22:22:51 (UTC+8)

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	49.18%	4446 / 9039
🔵	Statements	48.91%	4702 / 9613
🔵	Functions	46.74%	875 / 1872
🔵	Branches	44.22%	2379 / 5379

File Coverage

No changed files found.

Generated in workflow #3682 for commit 9c6f32a by the Vitest Coverage Report Action

[github-actions]

✅ Build and publish successful - Preview fastgpt Image:

ghcr.io/labring/fastgpt-pr:fastgpt_9c6f32ad9eae0a83386ce35e69d187fdc90a092c

🕒 Time: 2026-09-22 22:24:30 (UTC+8)

[ctlaltlaltc]

等 Pro PR合并后即可删除这些 deprecated schema/type

[c121914yu]

我来合并下冲突