Java async support: Native non-blocking SDKs with reactive streaming

In the evolving landscape of Java programming, the shift towards asynchronous, non-blocking I/O is being embraced through SDKs that integrate CompletableFuture and Reactive Streams, catering to modern reactive architectures without forsaking familiar synchronous methods. These SDKs are designed to address the inefficiencies of traditional blocking models, such as idle threads and wasted memory, by offering dual interfaces that allow developers to opt into asynchronous patterns where beneficial while maintaining synchronous defaults. The async-native design leverages Java's HttpClient, NIO.2 primitives, and reactive ecosystems like Project Reactor and RxJava to efficiently manage compositional orchestration, latency tolerance, concurrency scaling, and resource efficiency. This approach ensures that developers can deploy scalable, cost-effective solutions in cloud or edge environments by reducing memory usage and thread counts. Additionally, the unified SDK paradigm facilitates a seamless transition to async programming for API producers, supporting both sync and async interfaces to broaden application reach and simplify maintenance. With this release, developers are encouraged to regenerate their Java SDKs to unlock the advantages of non-blocking I/O, thus preparing for a future of real-time streaming systems and cloud-native microservices.