[observability] Collecting Node Performance Metrics with sar and iostat on ACP

[jing2uo]

新增一篇 ACP KB 文章。

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 24e1db65-3523-42c2-8568-63aea94cb8ff

📥 Commits

Reviewing files that changed from the base of the PR and between 55a33b3 and a4119d3.

📒 Files selected for processing (1)

• docs/en/solutions/Collecting_Node_Performance_Metrics_with_sar_and_iostat_on_ACP.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch kb/2026-04/collecting-performance-metrics-with-sar

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