Fix go vet findings

[google-labs-jules]

This change addresses several go vet findings and corrects a typo in a comment. The primary change is to use keyed fields in tag.Tag struct literals to improve readability and maintainability. Additionally, a typo in a comment in pkg/personname/info.go has been corrected.

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PR created automatically by Jules for task 16903968295435200553 started by @suyashkumar

[google-labs-jules]

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