Lazy cache Knowhere chunk pages

[suguanYang]

Summary

• mark Knowhere-backed sources ready when a completed job exposes a document id instead of waiting on result.zip mirroring
• load chunk pages lazily through Knowhere listChunks, key cached pages by document id plus current revision/job id, and mirror visible page assets into Vercel Blob in the background
• keep full-tree loads structure-only, add paginated lightweight remote document rows, and materialize remote documents only when opened
• update the Knowhere SDK to ^0.10.0 and pin Next dev root to this workspace

Verification

• pnpm typecheck
• pnpm lint
• pnpm vitest run src/domains/chunks/server.test.ts src/domains/sources/route-service.test.ts src/domains/workspace/initial-state.test.ts
• staging smoke: documents.list pagination returned page 1 / pageSize 2 / total 4 / totalPages 2
• staging smoke: listChunks with includeAssetUrls false returned job_1d6de91af517 and no asset URLs
• staging smoke: listChunks with includeAssetUrls true returned upstream asset URLs
• local smoke: /api/sources returned 200 and selected Sydney Streets Code.pdf with document doc_2fb226371985
• local smoke: /api/sources/ec815020-2238-4fa6-b37f-2395758cca7d/chunks?page=1&pageSize=2 returned 200, 2 chunks, total 1735, and Vercel Blob asset URLs after warm
• local DB smoke: source revision key persisted as job_1d6de91af517

[vercel]

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Project	Deployment	Actions	Updated (UTC)
knowhere-notebook-staging	Ready	Preview, Comment	Jun 30, 2026 2:14pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
knowhere-notebook	Ignored		Jun 30, 2026 2:14pm