Update documentation to reflect dependency pinning for NeMo Agent Toolkit

[AjayThorve]

No description provided.

[greptile-apps]

Greptile Summary

This PR is a documentation-only update that adds a prominent dependency warning across the project's key entry points, notifying users that AI-Q is pinned to NeMo Agent Toolkit (NAT) v1.4.0 (nvidia-nat==1.4.0) and that upgrading to v1.5 or later is not yet supported. The warning appears in both README.md and docs/source/get-started/installation.md as a blockquote note, and a matching changelog entry is added to docs/source/resources/changelog.md under v2.0.1 (In Development). The .secrets.baseline file is updated to reflect the shifted line number (309 → 311) caused by the two inserted lines in README.md.

Key changes:

• Added a > *Dependency Note:* blockquote in README.md and docs/source/get-started/installation.md accurately reflecting the nvidia-nat==1.4.0 pin present in pyproject.toml.
• Added a bullet point to the v2.0.1 changelog entry documenting the NAT pin.
• Updated .secrets.baseline line reference from 309 to 311 (correct offset) and refreshed the generated_at timestamp.

Confidence Score: 5/5

• This PR is safe to merge — it contains only documentation updates with no code changes.
• All four changed files are documentation or metadata (README.md, installation.md, changelog.md, .secrets.baseline). The dependency note is factually accurate and consistent with the actual nvidia-nat==1.4.0 pin in pyproject.toml. The .secrets.baseline line number update is arithmetically correct. No runtime, security, or behavioral risks.
• No files require special attention.

Important Files Changed

Filename	Overview
README.md	Adds a blockquote dependency note warning users that this release is pinned to nvidia-nat==1.4.0; accurate and consistent with pyproject.toml.
docs/source/get-started/installation.md	Adds the same NAT v1.4.0 dependency note under Prerequisites; wording matches README.md and is factually accurate.
docs/source/resources/changelog.md	Adds a changelog bullet for the NAT v1.4.0 pin under the v2.0.1 (In Development) section; no issues found.
.secrets.baseline	Updates README.md secret line_number from 309 to 311 (correct offset for 2 inserted lines) and refreshes the generated_at timestamp.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[User installs AI-Q] --> B{Check nvidia-nat version}
    B -->|nvidia-nat==1.4.0| C[✅ Supported\nFull compatibility]
    B -->|nvidia-nat >= 1.5.0| D[⚠️ Not yet supported\nMay cause breaking changes]
    D --> E[Pin to nvidia-nat==1.4.0\nper pyproject.toml]
    E --> C
    C --> F[Run AI-Q normally]

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_{Last reviewed commit: 81e1ce6}