[Bug] DatasetSegmentListApi in Service API returns invalid has_more and metadata when page or limit is non-positive

从 api/controllers/service_api/dataset/segment.py 中的 DatasetSegmentListApi.get 开始，然后将其分页处理与 api/controllers/service_api/app/annotation.py 中的 AnnotationListApi 进行比较。使用 limit=0 和非正 page 值复现请求，并验证返回的数据以及 has_more、limit 和 page 元数据使用了规范化的分页值。

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Dify version

1.0.0-dev (main)

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

1. Inspect DatasetSegmentListApi.get in api/controllers/service_api/dataset/segment.py.
2. Notice page and limit = min(args.limit, 100) are read from query arguments without calling clamp_pagination(args.page, args.limit, 100).
3. Send a GET request to /v1/datasets/{dataset_id}/documents/{document_id}/segments?limit=0 using a valid dataset API key for a document with existing chunks.
4. Inspect the returned JSON response payload.

✔️ Expected Behavior

DatasetSegmentListApi.get should normalize page and limit using clamp_pagination(args.page, args.limit, 100) (matching sibling endpoints like AnnotationListApi in api/controllers/service_api/app/annotation.py), ensuring effective_page and effective_limit are used consistently for query execution and response metadata fields (has_more, limit, page).

❌ Actual Behavior

Unclamped variables are passed directly to the response metadata:

• response["has_more"] evaluates 0 * 0 < total, returning true for any non-empty document (total > 0).
• API consumers using has_more for pagination get trapped in infinite request loops.
• response["limit"] and response["page"] return unclamped non-positive numbers (0 or negative integers), contradicting the actual returned data array.