docs: document knowledge data storage limits for cloud plans

[RiskeyL]

What this adds

Prepared ahead of the Cloud rollout of pre-write vector storage estimation and the paid-plan document size raise. Hold merge until both are live on Cloud.

New page: Knowledge Data Storage Limit ({en,zh,ja}/cloud/use-dify/knowledge/knowledge-storage-limit)

• Per-plan storage quotas (50 MB / 5 GB / 20 GB) and where to check usage
• What consumes storage: chunk count and embedding dimensions, not raw file size; Economical indexing exempt
• The pre-upload estimation check and how to bring a rejected upload under the limit
• Blocked actions at the limit, plus downgrade/expiry behavior (existing data retained, retrieval keeps working, new writes blocked — confirmed with R&D)
• Freeing space and the usage refresh delay
• Cross-linked from the index method page's High Quality tab

Plan-based upload limits on existing pages

• Upload Local Files: limits presented per plan in a table (Sandbox 1 file / 15 MB; paid 50 files / 50 MB). The old "5 files per upload" claim is corrected — the Sandbox batch limit is 1, enforced in code today
• Knowledge Pipeline Orchestration: File Quantity / File Size / Storage rows updated to per-plan values

Service API specs (en/zh/ja)

• Per-plan document file size limits on the four knowledge file endpoints; pipeline file-upload keeps the separate media limits (10/50/100 MB)
• file_too_large 413 documented on Create Document by File (the create path returns 413 with this feature; current main returns 400)

Glossary: Knowledge Data Storage UI label row, termbase synced.

Close DC-154

[Copilot]

Pull request overview

Adds Cloud documentation for plan-based knowledge vector storage quotas and upload limits, and aligns the Service API reference plus glossary/termbase terminology ahead of the Cloud rollout.

Changes:

• Add a new “Knowledge Data Storage Limit” page (en/zh/ja) describing per-plan quotas, what consumes storage, and limit behaviors.
• Update existing Knowledge pages (en/zh/ja) to reflect plan-based upload limits and link to the new storage-limit page.
• Update Service API specs (en/zh/ja) to document per-plan file size caps and a file_too_large 413 response; sync glossary/termbase and navigation.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
zh/cloud/use-dify/knowledge/knowledge-storage-limit.mdx	New Chinese page describing knowledge storage quotas and limit behavior.
ja/cloud/use-dify/knowledge/knowledge-storage-limit.mdx	New Japanese page describing knowledge storage quotas and limit behavior.
en/cloud/use-dify/knowledge/knowledge-storage-limit.mdx	New English source page for knowledge storage quotas and limit behavior.
zh/cloud/use-dify/knowledge/knowledge-pipeline/knowledge-pipeline-orchestration.mdx	Updates pipeline limitations table to plan-based quotas/limits (with one terminology consistency nit).
ja/cloud/use-dify/knowledge/knowledge-pipeline/knowledge-pipeline-orchestration.mdx	Updates pipeline limitations table to plan-based quotas/limits.
en/cloud/use-dify/knowledge/knowledge-pipeline/knowledge-pipeline-orchestration.mdx	Updates pipeline limitations table to plan-based quotas/limits.
zh/cloud/use-dify/knowledge/create-knowledge/setting-indexing-methods.mdx	Adds cross-link noting vectors count toward knowledge storage with link to the new page.
ja/cloud/use-dify/knowledge/create-knowledge/setting-indexing-methods.mdx	Adds cross-link noting vectors count toward knowledge storage with link to the new page.
en/cloud/use-dify/knowledge/create-knowledge/setting-indexing-methods.mdx	Adds cross-link noting vectors count toward knowledge storage with link to the new page.
zh/cloud/use-dify/knowledge/create-knowledge/import-text-data/readme.mdx	Replaces old upload limit claims with a per-plan table (needs a blank line before ---).
ja/cloud/use-dify/knowledge/create-knowledge/import-text-data/readme.mdx	Replaces old upload limit claims with a per-plan table (needs a blank line before ---).
en/cloud/use-dify/knowledge/create-knowledge/import-text-data/readme.mdx	Replaces old upload limit claims with a per-plan table.
zh/api-reference/openapi_service.json	Documents file-size caps and adds file_too_large 413 example for the document-by-file create path.
ja/api-reference/openapi_service.json	Documents file-size caps and adds file_too_large 413 example for the document-by-file create path.
en/api-reference/openapi_service.json	Documents file-size caps and adds file_too_large 413 example for the document-by-file create path.
writing-guides/glossary.md	Adds UI glossary row for “Knowledge Data Storage”.
tools/translate/termbase_i18n.md	Syncs termbase row for “Knowledge Data Storage”.
docs.json	Adds the new page to navigation for en/zh/ja Knowledge sections.

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