build: prepare for lathe v0.6.0

[samzong]

What's changed?

• Pin the Lathe generator and runtime to main commit e335809.
• Regenerate the CLI catalog and Agent Skill with schema 11.
• Assert structured HTTP error status instead of deprecated message text.

Why

• Prepare this starter for Lathe v0.6.0 using the exact release candidate commit.

Verification

• pnpm check
• ./bin/appctl __lathe verify --json

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: b1ad1e1420

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[samzong]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Bravo.

Reviewed commit: 373e608608

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".