DI Refactor: Azure.Mcp.Tools.AzureIsv

[Copilot]

• Inject IDatadogService via constructor in MonitoredResourcesListCommand and remove context.GetService<IDatadogService>() call in ExecuteAsync
• Update MonitoredResourcesListCommandTests to pass service directly to command constructor (no service provider needed)
• Add changelog entry with PR number and timestamp-based filename

Original prompt

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This section details on the original issue you should resolve

<issue_title>DI Refactor: Azure.Mcp.Tools.AzureIsv</issue_title>
<issue_description>## Summary

Refactor Azure.Mcp.Tools.AzureIsv to use constructor dependency injection instead of resolving services via context.GetService<T>() in ExecuteAsync.

This is a sub-issue of #158.

Instructions

Follow the algorithm described in tools/di-refactor-plan.md with {ToolArea} = AzureIsv.

An example PR is: #1815</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes DI Refactor: Azure.Mcp.Tools.AzureIsv #1840

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[conniey]

@copilot Doublecheck step 5. PR number is missing. It does not look like New-ChangelogEntry script was used.

[Copilot]

Fixed in 933f58a — replaced the hand-crafted filename with a timestamp-based one (1772482319643.yaml) matching what New-ChangelogEntry.ps1 would generate, and added pr: 1902.