Implement parsed storage result layout

[suguanYang]

Summary

• Store parsed documents in storage using the expanded Knowhere result layout (manifest.json, chunks.json, doc_nav.json, sidecars/assets) instead of SDK-specific paged snapshots.
• Replace the public ParsedDocumentStorage adapter surface with result-relative object operations (readObject, writeObject, optional headObject, getObjectUrl, deletePrefix) while keeping SDK-owned sync progress methods.
• Add commit-marker based read validation, remote read-miss background sync, result ZIP sync, and fallback reconstruction from complete remote chunk pages.
• Update disk parsed storage, SDK docs, tests, and add a changeset for the breaking adapter-interface change.

Verification

• pnpm exec tsc --noEmit --pretty false
• pnpm test -- --run
• pnpm lint (passed with three pre-existing unrelated warnings in client/http-client tests)
• pnpm build
• git diff --check

Checklist

• Tests were added or updated when behavior changed
• Public docs or examples were updated when needed
• A changeset was added when a release should be published