Apply progressive disclosure to comment-memory disclosure note

[Copilot]

The comment-memory disclosure note was fully expanded on every managed comment, adding visual noise for readers who already understand what it is.

Changes

• actions/setup/md/comment_memory_disclosure_note.md: Wraps the explanation text in <details>/<summary> inside the [!NOTE] callout — summary line stays visible, detail text collapses by default. Adds a link to the glossary docs in the collapsed body.

Before:

> [!NOTE]
> This comment is managed by comment memory.
>
> It stores persistent context for this thread in the code block at the top of this comment.
> Edit only the text inside the backtick fences; workflow metadata and the footer are regenerated automatically.

After:

> [!NOTE]
> <details>
> <summary>This comment is managed by comment memory.</summary>
>
> It stores persistent context for this thread in the code block at the top of this comment.
> Edit only the text inside the backtick fences; workflow metadata and the footer are regenerated automatically.
>
> [Learn more about comment memory](https://github.github.com/gh-aw/reference/glossary/#comment-memory)
>
> </details>

[Copilot]

Pull request overview

Updates the comment-memory disclosure note to reduce visual noise by collapsing the explanatory text behind a progressive disclosure control.

Changes:

• Wrap the note body in <details>/<summary> so only the one-line summary is shown by default.
• Add a “Learn more” link to the comment-memory glossary entry inside the collapsed content.

Show a summary per file

File	Description
actions/setup/md/comment_memory_disclosure_note.md	Converts the disclosure note to a collapsible <details> block and adds a glossary link to keep managed comments more compact.

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• Files reviewed: 1/1 changed files
• Comments generated: 0