reduce instructions-janitor max lines target from 500 to 400

[Copilot]

Lowers all per-file line limits in the Instructions Janitor workflow from 500 to 400 to keep instruction files more compact for agentic consumption.

Changes

• .github/workflows/instructions-janitor.md — updated File Layout Goals table and size-audit enforcement rule:
  • syntax-*.md, safe-outputs-*.md, create-agentic-workflow.md, and any new .github/aw/*.md file: < 500 → < 400 lines
  • Size audit: "any file over 500 lines must be split" → 400
  • Workflow description updated to reflect new threshold
• .github/workflows/instructions-janitor.lock.yml — recompiled from updated source

[Copilot]

Pull request overview

This pull request updates the Instructions Janitor agent workflow guidance to tighten the target maximum length for instruction files, reducing the per-file line limit threshold from 500 to 400 to keep .github/aw/*.md content more compact for agentic loading.

Changes:

• Updated the workflow description and the “File Layout Goals” table thresholds from < 500 to < 400 where applicable.
• Updated the size-audit rule to require splitting/rewriting any file over 400 lines.
• Recompiled the generated workflow lock file to reflect the updated source markdown.

Show a summary per file

File	Description
.github/workflows/instructions-janitor.md	Lowers stated per-file size targets and the size-audit enforcement rule from 500 to 400 lines.
.github/workflows/instructions-janitor.lock.yml	Regenerated compiled workflow output to incorporate the updated markdown workflow content/metadata.

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• Files reviewed: 2/2 changed files
• Comments generated: 0
• Review effort level: Low