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

[cqjjjzr]

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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	2026-05-30 14:25:29.164154852 +0000
+++ /tmp/pyrefly_pr.txt	2026-05-30 14:25:15.074105958 +0000
@@ -2346,10 +2346,6 @@
    --> tests/unit_tests/controllers/service_api/dataset/rag_pipeline/test_rag_pipeline_workflow.py:328:33
 ERROR Missing argument `response_mode` in function `services.rag_pipeline.entity.pipeline_service_api_entities.PipelineRunApiEntity.__init__` [missing-argument]
    --> tests/unit_tests/controllers/service_api/dataset/rag_pipeline/test_rag_pipeline_workflow.py:328:33
-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	45.78%	45.82%	+0.05%
Strict coverage	45.30%	45.34%	+0.04%
Typed symbols	24,667	24,705	+38
Untyped symbols	29,527	29,520	-7
Modules	2762	2762	0