Add kql test

[xiangyan99]

What does this PR do?

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We got the feedback to add the test in the backporting PR.

Now creating a separate one to add into main.

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GitHub issue number?

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Pre-merge Checklist

• Required for All PRs
  • Read contribution guidelines
  • PR title clearly describes the change
  • Commit history is clean with descriptive messages (cleanup guide)
  • Added comprehensive tests for new/modified functionality
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• For MCP tool changes:
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  • Updated servers/Azure.Mcp.Server/README.md and/or servers/Fabric.Mcp.Server/README.md documentation
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• Extra steps for Azure MCP Server tool changes:
  • Updated command list in servers/Azure.Mcp.Server/docs/azmcp-commands.md
  • Ran ./eng/scripts/Update-AzCommandsMetadata.ps1 to update tool metadata in azmcp-commands.md (required for CI)
  • Updated test prompts in servers/Azure.Mcp.Server/docs/e2eTestPrompts.md
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    • Manual tests run: added comment /azp run mcp - pullrequest - live to run Live Test Pipeline

[Copilot]

Pull request overview

Adds a small unit test case to ensure the KQL safety validator continues to treat a non-destructive Kusto control command (.show version) as an allowed/safe query pattern.

Changes:

• Extend KqlQueryValidatorTests safe-query coverage by adding an InlineData case for .show version | project Version.

[jongio]

Looks good - .show version is correctly outside the dangerous commands list, and this fills a gap in safe-query coverage for read-only control commands.