Python: Fix Agent Lightning installation link

[Roger Barreto (rogerbarreto)]

Motivation & Context

The Agent Framework Lab Lightning README links to an Agent Lightning installation path that now returns HTTP 404. The lab package supports Agent Lightning 0.2.x and 0.3.x, so the setup link should target the compatible 0.3.0 documentation instead of the current stable documentation for the redesigned 1.0 release.

Description & Review Guide

• What are the major changes? Replaces the broken Agent Lightning installation URL with the versioned 0.3.0 installation guide.
• What is the impact of these changes? Readers can reach setup instructions compatible with the package dependency range.
• What do you want reviewers to focus on? Confirm the versioned documentation matches agentlightning>=0.2.0,<0.4.0.

Related Issue

N/A. No tracking issue.

Contribution Checklist

• The code builds clean without any errors or warnings
• All unit tests pass, and I have added new tests where possible
• The PR follows the Contribution Guidelines
• This PR is linked to an issue and there is no other open PR for this issue (see Related Issue above).
• This is not a breaking change. If it is a breaking change, add the breaking change label (or add "[BREAKING]" to the title prefix, before or after any language prefix) — a workflow keeps the label and title prefix in sync automatically.

[Copilot]

Pull request overview

Updates the Lightning lab README to link to installation documentation compatible with its Agent Lightning dependency range.

Changes:

• Replaces the broken stable installation link with the versioned 0.3.0 guide.
• Aligns setup guidance with agentlightning>=0.2.0,<0.4.0.

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[github-actions]

MAF Automated Review — Iteration 1

Result: No findings
Scope: full PR (1 commit(s)): eabc0a509f8b
Model: gpt-5.6-sol

Overview

This documentation-only change replaces the broken stable installation link with the Agent Lightning 0.3.0 guide, matching both the declared >=0.2.0,<0.4.0 dependency range and the lockfile resolved 0.3.0 version. Existing Markdown link validation covers the changed file and rejects HTTP errors. No publishable runtime, compatibility, architectural, or security risk was established.

Reviewed the supplied pull-request change set across correctness, security/reliability, architecture, and failure behavior.
No publishable findings remained after source verification for this scope.

[github-actions]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
TOTAL	46779	4357	90%

report-only-changed-files is enabled. No files were changed during this commit :)

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
9452	36 💤	0 ❌	0 🔥	2m 37s ⏱️