Handling transient faults in infrastructure injected via DI.

When injecting third-party clients (HTTP, DB), transient faults (timeouts, 503s) are inevitable. Resilience must be woven into the DI layer.

Using the Decorator pattern or native HTTP client factories, you can wrap the raw infrastructure dependency with a resilience policy (like Polly in C# or Resilience4j in Java). The consumer requests the interface, but receives a proxy that automatically executes retries, circuit breaking, and fallback logic without muddying the consumer's logic.