chore(docs): Remove AI Virtual Assistant Blueprint notebook

[tgasser-nv]

Description

The AI Virtual Assistant Bluepint notebook is out-of-date and should be deprecated. This PR removes it and all the references to it.

Related Issue(s)

Checklist

• I've read the CONTRIBUTING guidelines.
• I've updated the documentation if applicable.
• I've added tests if applicable.
• @mentions of the person or team responsible for reviewing proposed changes.

[github-actions]

Documentation preview

https://nvidia-nemo.github.io/Guardrails/review/pr-1682

[greptile-apps]

Greptile Summary

This PR deprecates and removes the AI Virtual Assistant Blueprint integration content — specifically the how-to guide (safeguarding-ai-virtual-assistant-blueprint.md), its companion Jupyter notebook (safeguard_ai_virtual_assistant_notebook.ipynb), and the TOC entry in docs/user-guides/advanced/index.rst. The change is clean and complete: a search across the full repository confirms no dangling references to the removed files remain.

• Removed the blueprint integration documentation guide (76 lines)
• Removed the companion Jupyter notebook (1,753 lines) demonstrating step-by-step Guardrails NIM integration
• Removed the corresponding entry from the advanced user-guides TOC in index.rst
• No other files in the repository reference these removed artifacts

Confidence Score: 5/5

• This PR is safe to merge — it is a pure deletion of out-of-date documentation with no functional code changes.
• All three deletions are consistent with the stated goal of deprecating the blueprint. The TOC reference is removed alongside the content, and no stale links to the removed files were found elsewhere in the repository.
• No files require special attention.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[docs/user-guides/advanced/index.rst] -->|previously referenced| B[safeguarding-ai-virtual-assistant-blueprint.md]
    B -->|pointed to| C[examples/notebooks/safeguard_ai_virtual_assistant_notebook.ipynb]

    A -- "❌ entry removed" --> B
    B -- "❌ file deleted" --> B
    C -- "❌ file deleted" --> C

    style B fill:#ffcccc,stroke:#cc0000
    style C fill:#ffcccc,stroke:#cc0000

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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