Add admonition format check and relax knowledge_article_id rule

[hilram7]

Summary

• Two updates to the /derek KB article quality reviewer skill based on issues identified during testing on PR docs: add PPE supportability statement as KB article #752.
  • The admonition format check was missed entirely during that review — /derek did not flag :::note and :::tip blocks that needed converting to KB-style blockquote callouts.
  • The knowledge_article_id rule was too strict — it flagged articles written natively in the repo without a ZD/SF ID.

Changes

• Admonition format check (new) — /derek now flags Docusaurus admonition blocks (:::note, :::tip, :::warning, :::danger) in KB articles and tells the writer to convert them to blockquote callouts (> **NOTE:** or > **IMPORTANT:**). Vale handles inline "Note that" text — /derek handles admonition syntax. No overlap.
• knowledge_article_id rule relaxed — field absent is no longer flagged. Only flagged if the field is present but empty. Articles written natively in the repo (not migrated from ZD/SF) will not have a ZD/SF ID, so requiring the field on all articles produced false positives.

Testing

• Admonition format — tested on docs/kb/privilegesecure/remote-desktop-and-rds/configuring-the-netwrix-privilege-secure-rds-web-app-launcher.md, the only KB article with Docusaurus admonition syntax. /derek correctly flagged :::warning at line 58 with the admonition-format rule and included the converted blockquote text in the message. Vale did not flag the same block — correct separation of concerns confirmed.
• knowledge_article_id absent — tested on docs/kb/passwordpolicyenforcer/ppe-supportability.md, which has no knowledge_article_id field. /derek found 3 other issues but did not flag the missing field. Rule change confirmed working.
• knowledge_article_id present but empty — not tested against a real article (no suitable candidate available). Low-risk untested path.