T24 Refactor plus README

Category: Code. Pass at at least 3/4.

All 40 tasks

Prompt

Refactor report.py: remove duplication into functions, keep behaviour identical, and add a README.md explaining usage. Prove behaviour is identical by running it before and after.

Inputs

Files attached to the chat:

• report.py

Checklist

Pass at at least 3/4.

• Output of `python3 report.py` byte-identical before and after
• Duplication gone (no block repeated 3 times)
• README.md with usage
• No new dependencies

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