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## Acceptance Criteria
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<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Two interactive tutorial notebooks added (Cognee Basics, Python
Development) with runnable code and rich markdown; MarkdownPreview for
rendered markdown; instance-aware notebook support and cloud proxy with
API key handling; notebook CRUD (create, save, run, delete).
* **Bug Fixes**
* Improved authentication handling to treat 401/403 consistently.
* **Improvements**
* Auto-expanding text areas; better error propagation from dataset
operations; migration to allow toggling deletability for legacy tutorial
notebooks.
* **Tests**
* Expanded tests for tutorial creation and loading.
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
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