Function validateArticleContent

validateArticleContent(
    html: string,
    language: string,
    articleType: string,
): ContentValidationResult
Validate the quality of a generated article.

Checks performed:
- Minimum word count threshold for the given article type
- Presence of un-replaced placeholder/template markers
- Existence of required structural HTML elements
- Language attribute consistency (lang and dir)
- Read-time accuracy (computed vs claimed)
- Meta tag synchronization (title/OG/Twitter alignment)
- Keyword localization for non-English articles
Parameters
- html: string
  Complete HTML string of the generated article
- language: string
  Language code of the article (e.g. "en", "de", "ar")
- articleType: string
  Article category string (e.g. "week-ahead")
Returns ContentValidationResult
Structured validation result with errors, warnings and metrics
- Defined in utils/content-validator.ts:853