Design a production Rust web backend with Axum, Tower middleware, sqlx, and structured observability.
## CONTEXT Rust has become a strong choice for performance-critical web backends in 2026, with Axum as the leading framework built on Tower and Hyper. The ecosystem includes sqlx or SeaORM for databases, tower-http for middleware, tracing for observability, and tokio as the runtime. Building a production service means…
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