fix(onedrive): support recursive listing and download for shared folder shortcuts

[m011]

Summary / 摘要

When users add shared folders to their OneDrive via official "Add shortcut to My files", the root item returned by Microsoft Graph API contains a
emoteItem facet rather than a standard native folder facet.

Previously, attempting to access subdirectories or files within such shortcuts resulted in:

• 422 Unprocessable Entity ("Children cannot be listed from an item that is not a folder")
• 404 ItemNotFound

This change:

• Resolves remoteItem ancestor targets in paths to query the target drive scope via /drives/{driveId}/items/{itemId}:{subPath}:/children.

• Enables multi-level recursive navigation and pagination across all shortcut subfolders.

• Properly resolves direct download links for nested files inside shared shortcuts.

• This PR has breaking changes. / 此 PR 包含破坏性变更。

• This PR changes public API, config, storage format, or migration behavior. / 此 PR 修改了公开 API、配置、存储格式或迁移行为。

• This PR requires corresponding changes in related repositories. / 此 PR 需要关联仓库同步修改。

Testing / 测试

• go test ./...
• Manual test / 手动测试:
  • Verified Level 1 shortcut root (/Program, 316 items with pagination across multiple pages)
  • Verified Level 2 nested subdirectory (/Program/dir1, 155 items)
  • Verified Level 3 deep nested subdirectory (/Program/dir1/dir2, 116 items)
  • Verified direct link resolution and range partial download for nested files

Checklist / 检查清单

• I have read CONTRIBUTING. / 我已阅读 CONTRIBUTING。
• I confirm this contribution follows the repository license, contribution policy, and code of conduct. / 我确认此贡献符合仓库许可证、贡献规范和行为准则。
• I have formatted the changed code with gofmt, go fmt, or prettier where applicable. / 我已按适用情况使用 gofmt、go fmt 或 prettier 格式化变更代码。
• I have requested review from relevant maintainers or code owners where applicable. / 我已在适用情况下请求相关维护者或代码所有者审查。

AI Disclosure / AI 使用声明

• This PR includes AI-assisted content. / 此 PR 包含 AI 辅助内容。

Tools used / 使用工具:

• Claude

Usage scope / 使用范围:
Assisted in analyzing Microsoft Graph API remoteItem responses and implementing recursive drive path resolution.