getFilingContent method
Fetch the text content of a specific filing.
Returns the text extracted from the filing document.
Implementation
@override
Future<String> getFilingContent(SecFiling filing) async {
_logger.info(
'Fetching content for ${filing.form} (${filing.accessionNumber})...',
);
final response = await _get(filing.url);
// Parse HTML and extract text content
return _extractTextFromHtml(response.body);
}