Enforce uppercase LEGACY comments

[louismrz72-boop]

Summary

Changes

Testing

Checklist

• Relevant modules affected by these changes build locally
• Tests pass locally
• Diagnostic build log is committed in this PR
• Documentation has been updated, if applicable
• Configuration or schema changes are documented, if applicable
• No generated build artifacts are committed, except the required diagnostic build log
• Changes are scoped to the PR purpose and avoid unrelated cleanup
• Security, privacy, and error-handling implications have been considered

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• I would like to request that my diagnostic build log is removed before merging

[louismrz72-boop]

Thanks for reviewing. I completed the uppercase LEGACY comment audit requested in #12.

Payout preference for the $6 bounty:

• USDC on Base or Polygon: 0x25A3038E32ccB5f3df94651B552c22Ae61740a3E
• Alternative: PayPal invoice/link can be provided if preferred.

I can also remove the diagnostic .logd artifacts before merge after review, per the PR template.