Switch Multi-Device Docs Tester workflow from Claude to Codex engine

[Copilot]

Updates the Multi-Device Docs Tester agentic workflow to use the Codex engine instead of Claude.

Changes

• Changed engine.id from claude to codex in workflow frontmatter
• Removed max-turns configuration (unsupported by Codex engine)
• Recompiled workflow to regenerate .lock.yml with updated engine configuration

# Before
engine:
  id: claude
  max-turns: 30

# After
engine:
  id: codex

The Codex engine doesn't support turn limits, so the max-turns field was removed during compilation.

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[Copilot]

Pull request overview

This PR migrates the Multi-Device Docs Tester agentic workflow from the Claude engine to the Codex engine. The change involves updating engine configuration, removing unsupported parameters, and regenerating the compiled workflow lock file with updated tooling versions.

Changes:

• Changed engine from claude to codex and removed max-turns configuration (unsupported by Codex)
• Updated to gh-aw v0.42.2 and awf v0.13.4 with corresponding infrastructure changes
• Recompiled workflow with engine-specific configuration including Codex CLI, API keys, MCP settings, and firewall images

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/daily-multi-device-docs-tester.md	Updated engine frontmatter from claude to codex and removed max-turns parameter
.github/workflows/daily-multi-device-docs-tester.lock.yml	Comprehensive regeneration with Codex-specific configuration including CLI installation, secret validation, environment variables, MCP configuration, execution commands, and updated versions

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