Hosted-tool execution layer, extracted from core so the pipeline module stays a pure through-pipe. Contains: - The hosted-tool SPI (HostedToolHandler, HostedToolRepository with the getOrder() precedence contract, HostedToolHandlerFactory, HostedToolResolution, OrchestratableTool) - The multi-pass hosted execution loop (HostedToolExecutor, pass lifecycle policies, output augmenter) Engine and SPI only: no repository implementation and ...