<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
- **Bug Fixes**
- Improved display of image and attachment blocks by ensuring image
captions are shown as content for images, while attachment names remain
as content for attachments.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
#### PR Dependency Tree
* **PR #12815** 👈
This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)
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Co-authored-by: fengmk2 <fengmk2@gmail.com>
close CLOUD-225
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Added support for reading document blocks without requiring a workspace or root document snapshot.
- **Bug Fixes**
- Improved handling of large workspace snapshots by skipping them when they exceed 10MB.
- **Tests**
- Introduced new test cases to cover scenarios where root or workspace snapshots are absent.
- Expanded snapshot tests for document block reading.
- **Refactor**
- Updated several function signatures to make root and workspace snapshot parameters optional for greater flexibility.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
