Returns complete article information including the full HTML body content,
collection details, author information, and engagement metrics (visits and reactions).
Use this endpoint when you need to display or edit a full article.

The response includes:

• Full article content (title, description, body, slug)
• Collection information
• Author details
• Publication status and timestamps
• Search keywords
• Engagement metrics (visits, positive/negative/neutral reactions)
• Featured status

Content Visibility

The response includes contact_segment_visibilities and company_segment_visibilities — arrays of
{segment_id, is_inherited} objects that define which contact/company segments can access this article.

Visibility rules on an article apply in two contexts:

• Aura (AI assistant): only contacts/companies in those segments can interact with this content.

• Help Center: if the help center is published, only contacts/companies in those segments will see
  this article in the public help center.

• is_inherited: true means the rule was propagated from the parent collection, not set directly on this article.

• An empty array means no restrictions apply (visible to everyone).

Use PUT /knowledge-base/articles to update visibilities.