Go API Tutorial Part 3: Adding Pagination, PUT Endpoint, Logging, and OpenAPI

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The third installment of a Go API routing tutorial series focuses on upgrading a basic API into a more production-ready service using only the standard library. The update introduces offset-based pagination for the GET /links endpoint, along with a new PUT /links/{id} route to update link notes. Request-scoped structured logging is added to make tracing individual requests easier without relying on guesswork. A lightweight OpenAPI specification is included so that other developers can understand the API without reverse-engineering it. All changes are implemented through updates to the store interface, memory store, and service layer in Go.

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