refactor(api): migrate console/service_api.dataset.document to BaseModel

[cqjjjzr]

Important

1. Make sure you have read our contribution guidelines
2. Ensure there is an associated issue and you have been assigned to it
3. Use the correct syntax to link this PR: Fixes #<issue number>.

Summary

See #28015 . Replace all inline Flask-RESTX request/response payload and query param models to Pydantic BaseModel.

Affected:

• controllers.console.datasets.datasets_document
• controllers.service_api.dataset.document

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran make lint && make type-check (backend) and cd web && pnpm exec vp staged (frontend) to appease the lint gods

[github-actions]

Pyrefly Diff

base → PR

--- /tmp/pyrefly_base.txt	2026-05-25 02:09:17.874165097 +0000
+++ /tmp/pyrefly_pr.txt	2026-05-25 02:09:08.375137690 +0000
@@ -2116,10 +2116,6 @@
    --> tests/unit_tests/controllers/service_api/dataset/test_dataset_segment.py:304:54
 ERROR Argument `list[str] | None` is not assignable to parameter `obj` with type `Sized` in function `len` [bad-argument-type]
    --> tests/unit_tests/controllers/service_api/dataset/test_dataset_segment.py:597:20
-ERROR Object of class `NoneType` has no attribute `name` [missing-attribute]
-   --> tests/unit_tests/controllers/service_api/dataset/test_document.py:238:16
-ERROR Object of class `NoneType` has no attribute `indexing_status` [missing-attribute]
-   --> tests/unit_tests/controllers/service_api/dataset/test_document.py:239:16
 ERROR Missing argument `app_model` in function `protected_view` [missing-argument]
    --> tests/unit_tests/controllers/service_api/test_wraps.py:160:36
 ERROR `object` is not assignable to attribute `request` with type `Request` [bad-assignment]

[github-actions]

Pyrefly Type Coverage

Metric	Base	PR	Delta
Type coverage	45.35%	45.40%	+0.05%
Strict coverage	44.87%	44.92%	+0.05%
Typed symbols	23,382	23,418	+36
Untyped symbols	28,477	28,466	-11
Modules	2610	2610	0