Apple Silicon and Xcode 27 images available in pay-as-you-go (preview)

Introduces Apple Silicon (arm64) macOS agents in Azure Pipelines as a public preview feature within the pay-as-you-go GitHub-hosted Agents pool. This allows for native building and testing of applications on Apple Silicon, avoiding emulation overhead and providing validation against the same architecture used by current Apple devices. The post details the new agent sizes (Standard and XLarge) and their corresponding VM image labels (`macos-26-arm64`, `macos-26-arm64-xl`, `xcode-27`, `xcode-27-xlarge`). It also announces a new naming convention for macOS images, based on major Xcode versions, and highlights enhanced monitoring capabilities for per-minute usage in the pool analytics and Azure Cost Management.