series: backend-engineering-with-axum (3 parts)

1. 2026-07-02 :: Learn Axum Basics and Routing by Building a URL Shortener :: #axum, #backend, #rust
2. 2026-07-08 :: Learn Axum Error handling by Building a Pastebin API :: #axum, #backend, #rust
3. 2026-07-15 :: Learn Axum Persistence and Transactions with SQLx by Building a Bookmark Manager :: #axum, #backend, #rust