fix: align lifecycle hooks, feature metadata, and VS Code behavior

[wcgomes]

Summary

This branch brings the Apple devcontainer CLI lifecycle behavior and its contracts closer to the official devcontainer model.

• Align up, clone, rebuild, and start around host-side initializeCommand, lifecycle ordering and failure cleanup, reuse/resume behavior, concurrent object-map hooks, waitFor, userEnvProbe, and shutdownAction admission.
• Update lifecycle execution, config admission/resolution, metadata labels, feature contributions/remelt handling, command/runtime output, recovery, and success presentation.
• Clarify VS Code behavior: --vscode gates host opening rather than customization application, start does not apply settings/extensions, and postAttachCommand follows the CLI-attach policy across lifecycle paths.
• Expand command, unit, recovery, VS Code, and integration coverage for the new lifecycle and attach semantics.
• Archive the completed lifecycle change under specs/changes/archive/20260814-align-official-lifecycle/, move the delivered VS Code customizations change into its dated archive location while preserving its restored content, and refresh the domain specs and wiki indexes.
• Make fixture E2E setup inspect for a cached image first, pull only when missing, and skip cleanly when pulling fails; document the TTY-safe swift run adevcontainerTests < /dev/null invocation.

Verification context

The diff adds and updates MiniTest command, unit, recovery, VS Code, and integration cases, including image-cache/pull/skip behavior and protection against duplicate postStartCommand execution during recovery. CONTRIBUTING.md identifies swift run adevcontainerTests as the suite of record and documents the non-interactive invocation. This description does not claim a test run that is not recorded by the branch diff.