test: AUT-1545 add git lifecycle marker

[svcnemo-autobot]

Background

Exercise the requested Git and PR lifecycle for qualification pass 78e13595.

What changed

Added root-level hello.md and world.md, each with the exact requested marker and trailing newline.

Details

flowchart LR
  A[hello.md] --> B[open PR]
  B --> C[world.md update]
  C --> D[close PR]

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Tested

• Verified exact content, one line, and trailing newline in both files
• Verified each commit contains only its requested file
• Ran pre-commit run --files hello.md world.md; configured hooks skipped the root Markdown files by their filters

[copy-pr-bot]

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[svcnvidia-nemo-ci]

/ok to test caad5d2

[svcnvidia-nemo-ci]

/ok to test 117a6d7