Function extractSecurity

extractSecurity(input: DocumentInput): SecurityMetadata
Extract security metadata from HTML.
Parameters
- input: DocumentInput
  Parsed HTML document or raw HTML string
Returns SecurityMetadata
Security metadata
Remarks
Extracts security and privacy-related meta tags including referrer policy, content security policy, and browser compatibility directives.
Example
```
// With parsed document (recommended for multiple extractions)
const doc = parseHTML(htmlString);
const security = extractSecurity(doc);

// Or directly with HTML string
const security = extractSecurity(htmlString);
```
- Defined in src/metadata/security/extract.ts:34