chore: update dependencies and refactor README with architecture diagram#3

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gjchentw wants to merge 2 commits intoginmills:masterfrom

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Commits on Jan 28, 2026

feat: Upgrade Go version, update Gin framework, and synchronize module dependencies.
gjchentw
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docs: rewrite and expand README with detailed explanations, architecture diagram, and multiple usage examples.
gjchentw
committed